Allen-Bradley 857 Quick start guide

Type
Quick start guide

This manual is also suitable for

857 Protection System for Feeder and Motor Protection,
Bulletin 857, Series A
Catalog Number 857-QS001B-EN-P
Quick Start
Original Instructions
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are
required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 3
Table of Contents
Preface
Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Supported Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 1
Overview SetPointPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Firmware Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Before Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Catalog Number Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2
Mounting and Wiring
Instructions
Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Measuring and Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Voltage Measurement Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chapter 3
Local Panel User Interface Protection System Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Menu Navigation and Pointers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Communication Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Digital and Virtual Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Virtual Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Output Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Chapter 4
Installation Step 1: Gather Required Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Step 2: Review Required Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Step 3: Validate the 857 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Configuring the Protection System. . . . . . . . . . . . . . . . . . . . . . . . . . 30
Step 4: Power Up, Configuring the Protection System and Verifying
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Step 5: Configuring the SetPointPS Software Tool . . . . . . . . . . . . . . 32
Step 6: Configuring the Protection System Using SetPointPS . . . . . 33
Set the Valid Protection Stages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Set the Current Scaling Parameter Using the Front Panel . . . . . 36
4 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Table of Contents
Notes:
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 5
Preface
This publication guides you through the 6 basic steps that are required to start
up your Allen-Bradley® 857 Protection System for the first time for simple
applications. The comprehensive protection functions of the Protection
System make it ideal for utility, industrial, marine, and offshore power
distribution applications. Because the Protection System is designed for global
applications, it includes both ANSI IEEE and IEC protective function
numbers and symbology.
Who Should Use This Manual
This manual is intended for qualified personnel who understand the hazards
that are associated with electromechanical equipment installations.
Personnel must:
Follow all applicable local, national, and/or international electrical
codes.
Be able to program and operate motor/feeder protection devices of this
type and style.
Have an understanding of the appropriate parameter settings and their
protective functions that are related to the load being controlled and
protected.
Have access to the user manual 857- UM001
and be familiar with the
characteristics of the device.
Equipment
The following equipment requirements must be followed and applied to use
this quick start procedure.
The 857 Protection System is in a standalone installation.
No load sharing or multiple motors on one Protection System.
Access to an approved programming cable – catalog number
857VX003-3.
A computer with an available USB port and a USB to RS-232 serial port
converter. Such as the Allen-Bradley 9300-USBS USB to Serial Adapter.
The latest available version of the SetPointPS programming and
commissioning software tool that is downloaded and installed on a
portable computer. The SetPointPS software is available at
www.rockwellautomation.com
.
Supported Applications
This publication is intended for use with 857 protection systems that are used
on typical applications. For example, induction machines, motors controlling
fans, pumps, compressors, conveyors, or feeder type loads such as transformer
and capacitor bank protection.
6 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Preface
Installation
The content of this manual assumes that the 857 Protection System is installed
according to Rockwell Automation® guidelines and includes the following.
The Protection System installation meets mechanical requirements for
orientation, cooling and mounting hardware.
The Protection System installation meets environmental requirements
for surrounding air temperature, ambient atmosphere, and the enclosure
rating.
The Protection System installation meets electrical requirements for AC
or DC supply, wiring and grounding, and the appropriate application of
overload and short circuit protection. Based on the switching
technology for the load (breaker versus contactor).
The Protection System installation is compliant with all applicable local,
national, and international codes, standards, and requirements.
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/global/literature-library/overview.page
.
For paper copies of technical documentation, contact your local Allen-Bradley
distributor or Rockwell Automation sales representative.
IMPORTANT This guide does not replace the User Manual, publication 857-UM001
, and is
intended for qualified service personnel responsible for installing and
servicing these devices. You must have previous experience with and a basic
understanding of electrical terminology, configuration procedures, required
equipment, and safety precautions. See the SetPointPS Configuration
Software Programming Manual 857-PM001
for more information.
Resource Description
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
Provides general guidelines for installing a Rockwell
Automation® industrial system.
Product Certifications website, http://
www.rockwellautomation.com/global/certification/
overview.page
Provides declarations of conformity, certificates, and
other certification details.
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 7
Chapter 1
Overview
All necessary steps must be taken to assure that each application and use meets
all performance and safety requirements. All applicable laws, regulations,
codes, and standards must also be followed.
The illustrations, charts, sample programs, and layout examples that are shown
in this guide are intended solely for purposes of example. There are many
variables and requirements that are associated with any particular installation.
Rockwell Automation® does not assume responsibility or liability (to include
intellectual property liability) for actual use that is based on the examples that
are shown in this publication.
Important differences between solid-state equipment and electromechanical
devices are discussed in Rockwell Automation SGI-1.1, Safety Guidelines for
the Application, Installation and Maintenance of Solid-State Control. See your
local Allen-Bradley distributor for a copy. These differences must be
considered when products are applied such as the ones described in this
publication.
SetPointPS
SetPointPS is a relay configuration tool for Rockwell Automation 857
Protection Systems. All configurations are made with a user-friendly graphical
interface and the created documents can be printed and saved. SetPointPS can
read all information directly from the device. It can be obtained free of charge
at www.rockwellautomation.com
.
It is possible to read and evaluate disturbance recordings from Rockwell
Automation 857 and 865 Protection Systems. The built-in evaluator uses
standard COMTRADE files for saving the records. See publication 857-
PM001.
User Interface
The relay is controlled in three ways:
Locally with the push button on the relay front panel, see Protection
System Front Panel on page 21).
Locally by using a personal computer that is connected to the serial port
on the front panel or on the rear panel of the relay (both cannot be used
simultaneously).
By remote control over at least one of the communication ports on the
relay rear panel.
8 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 1 Overview
Firmware Compliance
The Settings files between major revisions of firmware are not compatible with
other major versions. This statement is true of products with version 10.xxx
firmware, version 12.xxx firmware, or higher.
Operating Safety
Protection Functions
The comprehensive protection functions of the relay (Tab l e 1) make it ideal for
utility, industrial, marine, and offshore power distribution applications.
Because the 857 Protection System is designed for global applications, it
includes both ANSI IEEE and IEC protective function numbers and
symbology.
IMPORTANT Do not load Settings file between relays of different version numbers.
ATTENTION: The terminals on the rear panel of the relay can carry
dangerous voltages, even if the auxiliary voltage is switched off. Do not place
a live current transformer secondary-circuit in an open circuit condition. The
disconnection of a live circuit can cause dangerous voltages! Any operational
measures must be conducted according to national and local directives and
instructions.
IMPORTANT Read the operation instructions before performing any operational
measures.
Table 1 - List of Protection Functions
IEEE/ ANSI Code IEC Symbol Function Name Note
25 df/dv Synchrocheck
27 U<
U<<
U<<<
Undervoltage protection
32 P<
P<<
Reverse power protection
37 I< Undercurrent protection
46R I
2
> Current unbalance protection - Feeder protective
mode
Only available when
application mode is
feeder protection.
46 I
2
> Current unbalance protection - Motor protective
mode
Only available when
application mode is
motor protection.
47 I
2
>> Phase reversal / incorrect phase sequence protection Only available when
application mode is
motor protection.
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 9
Overview Chapter 1
48 I
st
> Stall protection Only available when
application mode is
motor protection.
49 T> Thermal overload protection
50ARC ArcI> Optional arc fault-protection
50BF CBFP Circuit-breaker failure protection
50N/51N
50G/51G
50GS/51GS
I
0
>
I
0
>>
I
0
>>>
I
0
>>>>
Earth-fault protection External connection
method and protective
settings define
protection type.
50NARC ArcI
01
>
ArcI
02
>
Optional earth-fault protection
50NC/51INC I
0
CAP Capacitor-bank unbalance protection
50/51 I>
I>>
I>>>
Overcurrent protection
59 U>
U>>
U>>>
Overvoltage protection
59N U
0
>
U
0
>>
Residual voltage protection
66 N> Frequent start protection Only available when
application mode is
motor protection.
67 I
φ
>
I
φ
>>
I
φ
>>>
I
φ
>>>>
Directional overcurrent protection
67N I
0
φ
>
I
0
φ
>>
Directional earth-fault protection
67NI I
Oint
> Directional transient intermittent earth-fault
protection
68F2 U
f2
> Magnetizing In Rush
68F5 U
f5
> Transformer over excitation, 2nd harmonic
81 f><
f>><<
Frequency protection, 5th harmonic
81L f<
f<<
Underfrequency protection
81R df/dt Rate of change of frequency (ROCOF) protection
86 Lockout All protective elements
can be set for lockout
control.
99 Prg1…8 Programmable stages
Table 1 - List of Protection Functions (continued)
IEEE/ ANSI Code IEC Symbol Function Name Note
10 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 1 Overview
General Precautions
Before Installation
WARNING: Have only qualified personnel service this equipment. If you are
not qualified to service this equipment, you can injure yourself or others, or
cause equipment damage.
Equipment components are sensitive to electrostatic discharge (ESD).
Undetectable permanent damage can result if you do not use proper ESD
procedures. Ground yourself, your work surface, and this equipment before
removing any cover from this equipment.
Disconnect or de-energize all external connections before opening this
device. Contact with hazardous voltages and currents inside this device can
cause electrical shock that can result in injury or death.
This document is to be utilized as a startup or a commissioning document
only. Full understanding of the relay protective functions is required before
any unit is placed in full protective mode.
See User Manual 857-UM001
for further details on the Bulletin 857
Protection Relay.
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 11
Overview Chapter 1
Catalog Number Explanation
a
Nom Phase Current (A) / Nom DI7-28 Activation Voltage
31 A/5 A / 24V
6 1 A/5 A / 110V
7 1 A/5 A / 220V
b
Nom Earth-fault Current I/O1 and I/O2 [A]
C1 A and 5 A
D0.2 A and 1 A
c
Additional I/O (X8 Terminal)
6None
7 Eight standard inputs, four TCS Hybrid inputs/outputs
8Ten outputs
9 Eight standard inputs and four outputs
(1)
(1) Some options not UL Listed. Check with your Rockwell Automation® representative.
d
Supply Voltage [V]
A 40…265Vac/dc
B 18…36 Vdc
C 40…265Vac/dc + Arc Protection Option
D 18…36 Vdc + Arc Protection Option
E 40…265Vac/dc + DI19, DI20 + arc channel, Optional
F 18…36 Vdc + DI19, DI20 + arc channel, Optional
e
Optional Hardware (Communication port 1)
Code Description
A TTL/RS-232 (VCM TTL)
B Plastic/Plastic serial fiber interface (VCM FIBRE PP)
CN/A
D RS-485 interface (4-wire, VCM 485-4)
E
Glass/Glass dual serial fiber interface for 857-RAD (857-VCMFIBRE
GG)
(1)
(1) Required for connection to 857-RAD Enhanced RTD Scanner. Only available in this location.
F Rx Plastic/Tx Glass serial fiber interface (VCM FIBRE PG)
G Rx Glass/Tx Plastic serial fiber interface (VCM FIBRE GP)
I RJ45 connection (RS-232, VCM 232)
M ST 100-Mbps Ethernet dual fiber interface inc. IEC 61850
N RTD glass fiber interface for 857-RAA (857-VCMRTD)
(2)
(2) Required for connection to the 857-RAA scanner only.
f
Optional Hardware (Communication port 2)
ANone
C RJ45 connection (RS-232, 857-VCM232)
D RS-485 interface (2-wire, 857-VCM485-2)
L Built-in RJ45 10 Mbps Ethernet interface
(1)
M Built-in RJ45 10 Mbps Ethernet interface inc. IEC 61850
(1)
(1) Cannot order in combination with the following optional Communication PORT 1:
(M) ST 100-Mbps Ethernet fiber interface with IEC 61850.
N RTD interface for 857-RAA (Glass fiber, 857-VCMRTD)
(2)
(2) Required for connection to the 857-RAA scanner only.
g
Ingress Protection Rating
- IP30 (Standard)
I IP54 (Optional)
C Ip30 (standard case) with conformal coated boards
K IP54 (dust-tight case) with conformal coated boards
Position
1234567
857 – 3 C 6 A A A –__
abcdefg
12 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 1 Overview
Notes:
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 13
Chapter 2
Mounting and Wiring Instructions
Mounting Instructions
To mount the Allen-Bradley® 857 Protection System, follow the sequence of
steps as they are outlined in the Figure 1
. Figure 2 shows the dimensions of the
unit.
Figure 1 - Mounting Instructions
1.0-10mm
193
139
2
4
3
4
1
2a
2b
i
14 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 2 Mounting and Wiring Instructions
Figure 2 - Dimensions
137 mm
(5.4 in.)
28 mm
(1.1 in.)
181 mm
(7.13 in.)
27 mm
(1.07 in.)
1.0…10.0 mm
(0.04…0.4 in.)
190 mm
(7.48 in.)
150 mm
(5.9 in.)
208 mm
(8.19 in.)
21 mm
(0.83 in.)
BA
Collar Part Number A B
857-VYX076 40 mm (1.57 in.) 169 mm (6.65 in.)
857-VYX077 60 mm (2.36 in.) 149 mm (5.87 in.)
857-VYX233 100 mm (3.94 in.) 109 mm (4.29 in.)
Optional Projection Mounting Collar
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 15
Mounting and Wiring Instructions Chapter 2
Measuring and Control
Connections
Allen-Bradley 857 Protection Relay is connected to the protected object
through these measuring and control connections.
The following terminal connections are shown in this quick start:
Te r m i n a l X 1 L e f t S i d e
on page 16
Te r m i n a l X 1 R i g h t S i d e on page 16
Te r m i n a l X 2 on page 16
Te r m i n a l X 3 on page 17
Te r m i n a l X 7 on page 17
Terminal X8 Model 857-3C7 on page 18
Terminal X8 Model 857-3C8 on page 19
Te r m i n a l X 6 on page 19
Terminal X6 with DI19/DI20 Option
on page 20
Figure 3 - Example of Allen-Bradley 857 Back Panel Communication Connection
IMPORTANT Some cards configurations are optional
IMPORTANT Settings that are associated with options or accessories, such as RTD
scanners require the option or accessory to be installed or connected before
being made available for configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
X3
X1
REMOTE
(TTL)
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
X6
X2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
X7
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
X8
Communication Option 1
Communication Option 2
16 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 2 Mounting and Wiring Instructions
Table 2 - Terminal X1 Left Side
Table 3 - Terminal X1 Right Side
Table 4 - Terminal X2
No: Symbol Description
1 IL1(S1) Phase current L1 (S1)
3 IL2(S1) Phase current L2 (S1)
5 IL3(S1) Phase current L3 (S1)
7 Io1/1A(S1) Residual current I/O1(S1)
9 Io2/5A(S1) Residual current I/O2(S1)
11 Ua See Voltage Measurement Mode
on page 20
13 Ub See Voltage Measurement Mode on page 20
15 -- --
17 Uc See Voltage Measurement Mode on page 20
19 -- --
No: Symbol Description
2 IL1(S2) Phase current L1 (S2)
4 IL2(S2) Phase current L2 (S2)
6 IL3(S2) Phase current L3 (S2)
8 Io1/1A(S2) Residual current I/O1 (S2)
10 Io2/5A(S2) Residual current I/O2 (S2)
12 Ua See Voltage Measurement Mode
on page 20
14 Ub See Voltage Measurement Mode on page 20
16 -- --
18 Uc See Voltage Measurement Mode on page 20
20 -- --
No: Symbol Description
1 A5 Alarm relay 5
2 A5 Alarm relay 5
3 A4 Alarm relay 4
4 A4 Alarm relay 4
5 A3 Alarm relay 3
6 A3 Alarm relay 3
7 A2 Alarm relay 2
8 A2 Alarm relay 2
9 IF COM Internal fault relay, common connector
10 IF NC Internal fault relay, normal closed connector
11 IF NO Internal fault relay, normal open connector
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 17
Mounting and Wiring Instructions Chapter 2
Table 5 - Terminal X3
Table 6 - Terminal X7
No: Symbol Description
1 48V Internal control voltage for digital inputs 1…6
2 DI1 Digital input 1
3 DI2 Digital input 2
4 DI3 Digital input 3
5 DI4 Digital input 4
6 DI5 Digital input 5
7 DI6 Digital input 6
8-- --
9 A1 COM Alarm relay 1, common connector
10 A1 NO Alarm relay 1, normal open connector
11 A1 NC Alarm relay 1, normal closed connector
12 T2 Trip relay 2
13 T2 Trip relay 2
14 T1 Trip relay 1
15 T1 Trip relay 1
16 -- --
17 Uaux Auxiliary voltage
18 Uaux Auxiliary voltage
No: Symbol Description
1 DI7 Digital input 7
2 DI8 Digital input 8
3 DI9 Digital input 9
4 DI10 Digital input 10
5 DI11 Digital input 11
6 DI12 Digital input 12
7 COM1 Common potential of digital inputs 7…12
8 DI13 Digital input 13
9 DI14 Digital input 14
10 DI15 Digital input 15
11 DI16 Digital input 16
12 D117 Digital input 17
13 DI18 Digital input 18
14 COM2 Common potential of digital inputs 13…18
15 T4 Trip relay 4
16 T4 Trip relay 4
17 T3 Trip relay 3
18 T3 Trip relay 3
18 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 2 Mounting and Wiring Instructions
Table 7 - Terminal X8 Model 857-3C7
No: Symbol Description
1 DI21 Digital input 21
2 DI22 Digital input 22
3 COM1 Common potential of digital inputs 21…2
4 DI23 Digital input 23
5 DI24 Digital input 24
6 COM2 Common potential of digital inputs 23…24
7 DI25 Digital input 25
8 DI26 Digital input 26
9 COM3 Common potential of digital inputs 25…26
10 DI27 Digital input 27
11 DI28 Digital input 28
12 COM4 Common potential of digital inputs 27…28
13 T8 Trip relay 8 / Digital input 32
14 T8 Trip relay 8 / Digital input 32
15 T7 Trip relay 7 / Digital input 31
16 T7 Trip relay 7 / Digital input 31
17 T6 Trip relay 6 / Digital input 30
18 T6 Trip relay 6 / Digital input 30
19 T5 Trip relay 5 / Digital input 29
20 T5 Trip relay 5 / Digital input 29
Rockwell Automation Publication 857-QS001B-EN-P - April 2017 19
Mounting and Wiring Instructions Chapter 2
Table 8 - Terminal X8 Model 857-3C8
Table 9 - Terminal X6
Available only when arc flash option is selected.
No: Symbol Description
1 DI21 Trip relay 14
2 DI22 Trip relay 14
3 COM1 Trip relay 13
4 DI23 Trip relay 13
5 DI24 Trip relay 12
6 COM2 Trip relay 12
7 DI25 Trip relay 11
8 DI26 Trip relay 11
9 COM3 Trip relay 10
10 DI27 Trip relay 10
11 DI28 Trip relay 9
12 COM4 Trip relay 9
13 T8 Trip relay 8 / Digital input 32
14 T8 Trip relay 8 / Digital input 32
15 T7 Trip relay 7 / Digital input 31
16 T7 Trip relay 7 / Digital input 31
17 T6 Trip relay 6 / Digital input 30
18 T6 Trip relay 6 / Digital input 30
19 T5 Trip relay 5 / Digital input 29
20 T5 Trip relay 5 / Digital input 29
No: Symbol Description
1BI External arc light input
2 BO Arc light output
3 COM Common connector of arc light I/O
4 S1>+ Arc sensor 1, positive connector
(1)
(1) Arc sensor itself is polarity free.
5 S1>– Arc sensor 1, negative connector
(1)
6 S2>+ Arc sensor 2, positive connector
(1)
7 S2>– Arc sensor 2, negative connector
(1)
20 Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Chapter 2 Mounting and Wiring Instructions
Table 10 - Terminal X6 with DI19/DI20 Option
Voltage Measurement Mode
The 857 Protection System can be connected to line-to-line or phase-to-
ground voltages. The connection is dependent on the application and available
voltage transformers. Set the configuration parameter “Voltage measurement
mode” according to the used connection.
Table 11 - Available Voltage Modes
The overvoltage protection is based on the line-to-line voltage regardless of the
measurement mode.
The wiring of the secondary circuits of voltage transformers to the device
terminal depends on the selected voltage-measuring mode.
No: Symbol Description
1 DI19 Digital input 19
2 DI19 Digital input 19
3 DI20 Digital input 20
4 DI20 Digital input 20
5—
6 S1>+ Arc sensor 1, positive connector
(1)
(1) Arc sensor itself is polarity free.
7 S1>– Arc sensor 1, negative connector
(1)
Mode Description
“2LL+U
0
The device is connected to line-to-line voltages U
12
(X1-11 and X1-12) and U
23
(X1-13 and
X1-14). Also to zero sequence voltage U
0
(X1-17 and X1-18). The phase-to-ground
voltages are calculated. The network must use only three wires. Any neutral wire must not
exist (two PTs/VTs in open Delta).
“3LN” The device is connected to phase-to-ground voltages U
L1
(X1-11 and X1-12), U
L2
(X1-13
and X1-14), and U
L3
(X1-17 and X1-18). The zero sequence voltage is calculated. A neutral
wire can exist (three PTs/VTs “Y” connected).
“1LL+U
0
/LLy” This mode is used with the Synchrocheck function. See Chapter 3, Synchrocheck Protection
(25) of the user guide for more information.
2LL/LLy” This mode is used with the Synchrocheck function. See Chapter 3, Synchrocheck Protection
(25) of the user guide for more information.
“LL/LLy/LLz” This mode is used with the Synchrocheck function. See Chapter 3
, Synchrocheck Protection
(25) of the user guide for more information.
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Allen-Bradley 857 Quick start guide

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Quick start guide
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