CONTROL DEVICE FOR E LECTRONIC EARTH
LEAKAGE PROTECTION RELAYS
CBS-4 SERIES
INSTRUCTION MANUAL
M98228301-03-17B
CIRCUTOR, SA
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Earth leakage protection relay
Verifications upon receipt
This manual provides installation tips and a guide for use of the control device for CBS-4 ea rth leakage
relays with the purpose of achieving its optimum performance. Upon receiving the device, check the
following points:
• That the device meets the specifications of your order.
• That it has not been damaged during shipping.
• Check that it is supplied with the corresponding Instruction Manual.
The safe use of the CBS-4/CBS-4C requires that the persons installing or using it
follow the customary safety measures, as well as the different warnings indicated in
the Instructions Manual.
This analyzer should only be installed and maintained by qualified staff.
CONTENTS
General features ……… ………………..…………..…………… page 4
Installation and start-up …………………………………..……………… page 6
Connection diagram …………………. ………………………………………..page 9
Description …………………………………….. page 13
Operation …………………………………..… page 18
Device adjustments ….……………………………….……………… page 21
COMMUNICATION SETUP programming ….……………………………….…… page 23
Measurement SETUP programming …………………………… page 25
SETUP menus diagram …………………………………..……………… page 26
MODBUS protocol …………………………………..…… page 27
MODBUS memory map …………………………………..……………… page 27
RS - 485 Connections …………………………………..…… page 29
Scada Power Studio applications …………………………………..…… page 30
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Earth leakage protection relay
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Earth leakage protection relay
GENERAL FEATURES
The CBS-4 earth leakage device is a type A programmable electronic earth leakage protection device
with 5 independent relays: 4 relays for controlling the circuit breaker elements of the four channels and
performing the protection and pre-alarm function, which has prevention and maintenance functions in the
installation.
It enables programming and adjustment of all the required parameters to obtain full maintenance
protection and control of the installation. A set of parameters can be configured via direct adjustments
using the keypad (buttons) and setup menus in the device.
Before starting up the earth leakage device, please read carefully the sections on power supply,
connection and programming.
The CBS-4 measures, calculates and displays the earth leakage
current of balanced or unbalanced three-phase industrial networks.
The measurement is made in RMS, via an earth leakage current
input, from the WG/WGS series exterior toroidal measuring
transformer.
In normal operating conditions, the main values that determine the
earth leakage protection of the installation, such as the sensitivity,
delay and instantaneous leakage current, are shown on the display.
We are aware of the high levels of prevention and maintenance required
for installations, and so have provided the device with a display and
indicator LEDs for any events that might arise.
Data displayed or indications of prealarms, trips, leakage readings, etc.
help provide us with enough information for good maintenance.
The backlit display is in green under normal operating conditions, but in the
case of any event causing a trip of the main relay, the display is backlit,
indicating the reason.
The version with RS - 485 communications and the adequate
software enable configuration, data and information centralisation to
obtain effective monitoring and control of the maintenance status of
our power lines.
Measurement of the earth leakage current from which the CBS-
4/CBS-4C acts by indicating the instantaneous leakage current, prealarm or trip is determined by the earth leakage transformers of the
WG series. The interior diameter of the transformer is defined by the
dimensions of the installation w iring.
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Earth leakage protection relay
Main Features
True RMS measurement.
Type A earth leakage protection. IEC 61008.1
Immunity to transients. IEC 61008.1
Filtering of high frequencies IEC 61008.1
Trip adjustment between 80 and 100% I
∆
n
Inverse curve. IEC 61008.1
Associated standards IEC 61008.1, IEC755
Other features
3 modules. DIN rail. In panel, via front panel accessory Code M5ZZF1
Display of instantaneous leakage values.
Backlit LCD display.
Built-in RS - 485 (Modbus RTU®) communicat ion s system . Only CBS-4C
Available types
RGU-10 SERIES
Code
CBS-4 P12711
CBS-4C P12712
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Earth leakage protection relay
INSTAL LATION AND START-UP
This manual contains information and warnings that the user must adhere to in order to guarantee the safe
operation of the CBS-4/CBS-4C, keeping it in a generally safe condition. The device should not be
switched on until it has been mounted in its final location in the electr ic pan el.
IF THE DEVICE IS USED IN A MANNER OTHER THAN THAT SPECIFIED BY THE MANUFACTURER, ITS
PROTECTIO N ELEMENTS MAY BE COMPROMISED.
When it is likely that the device has lost its safety protection (signs of visible damage), it should be
disconnected from the auxiliary power supply. In this case, contact a qualified technical service
representative.
Installing the device
The following points must be checked before the device is powered:
Power supply voltage.
Operating conditions.
Safety.
A. Power supply voltage:
Standard Version:
- Power supply: 230 Vac (± 20%)
- Frequency: 50/60 Hz
- Terminals 10-11: A1-A2
- Device consumption: 6 VA
Special Version:
- Power supply: 24..230Vac // 400 Vac // 12...230Vdc
- Frequency: 50/60 Hz
- Terminals 10-1: A1-A2
B. Changeover contacts of main/pre-alarm relay output:
- Trip contact terminals. : 13-14-15
- NO output terminal channel 1 : 13
- Common output terminal : 14
- NO output terminal channel 2 : 15
- Trip contact terminals : 7-8-9
- NO output terminal channel 3 : 7
- Common output terminal : 8
- NO output terminal channel 4 : 9
- Material : AgCdO
- Instantaneous nominal/max imum curr ent : 6 / 10 A
AC
- Rated/maximum switching voltage : 230 Vac
- Nominal load in AC. : 2500 VA
- Contacts protected by varistor : 275 Vac
- Useful mechanical life : 10·10
6
- Ambient temperature range : - 40…+85ºC
- Useful electrical life for AC loads. Cut off power for DC loads.
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Earth leakage protection relay
C. External input for Trip/Rearm:
- Terminals : 10 – 12
- Type of input. : Optocoupled
- Maximum voltage / Maximum power : 110 – 230 Vac (± 20%) / 0.7 W
D. E art h leakage cur r ent meas ur ement ci rcui t
Scale range
Scale background:
Display resolution
30 mA
75 mA
± 1 mA
300 mA
750 mA
± 1 mA
3 A
7.5 A
±0.1 A
30 A
75 A
± 1 A
E. Operating conditions
- Operating temperature : -10ºC…+50ºC
- Relative humidity : 5 ... 95 RH (without condensation)
- Altitude : up to 2000 m
F. Safety:
- Designed for category III 300 Vac installations. (EN 61010).
- Double-insulated electric shock protection class II.
INSTALLATION AND ASSEMBLY
The device is installed on DIN rail or panel (panel drill 67
+1
x 67+1 mm, in accordance with DIN 43 700 with
accessory M5ZZF1). All the connections are located inside the electric panel.
Take into account that when the device is connected, the terminals may be hazardous to the touch, and opening
the covers or removing elements may provide access to parts that are dangerous. Do not use the device unti l it
is fully installed.
To install the device on a panel, use a 72x72 mm frontal adapter. All the connections remain inside the
electric panel.
The frontal adapter accessory has a base, a frame, two tabs and
three screws.
1. Place the base on the drill hole made on the panel.
2. Locate the unit behind the base.
3. Screw the base onto the unit using the holes in the top right and
bottom left hand corners of the front panel.
4. Fit on the front panel to cover the fixing holes.
5. Fit the green pressure tabs on the side rails of the base.
6. Move the tabs towards the panel to fix it.
Example. How to connect the
different parts of the front panel
accessory to the unit.
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Earth leakage protection relay
Connection features
Device connection using cable with cross-section from 0.5 a 2 mm2
Recommended torque 0.5-0.6 Nm
Length of stripped cable 5-7 mm
To connect the earth leakage transformer over long distances, the use of braided cable is recommended..
List of terminals
No. Description of terminals
1 Pre-alarm signalling contact
2 Common 1S2 input
3 1S1-T4 input
4 1S1-T3 input
5 1S1-T2 input
6 1S1-T1 input
7 Channel 3 NO trip contact
8 Common output contact
9 Channel 9 NO trip contact
10 A1 power supply voltage input / trip-rearm
11 A2 power supply voltage input
12 Trip-rearm input
13 Channel 1 NO trip contact
14 Common output contact
15 Channel 2 NO trip contact
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Earth leakage protection relay
CONNECTION DIAGRAMS
Connection of CBS-4/CBS-4C circuit breaker elements with current shunt coil. In the event of an earth
leakage relay trip due to a fault, test or error of the earth leakage current transformer.
1. See cause of the tripped channel on the red display.
2. Rearm the circuit breaker element.
3. Press the RESET button of the device for the tripped channel.
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