ground fault location

Ground fault location inAC & DC systems made easy

with BENDER EDS and RCMS systems

Secure Power

avoiding unwanted interruptions to operation

The increasing complexity of electrical installations places extreme-

ly high demands on the reliability of power supply systems. Even a

short power failure may be expensive due to production stoppage

and malfunction.

One decisive factor for the availability and operating safety of

electrical installations is the insulation resistance. Early detection,

fast localisation and elimination of insulation faults is the most

effective protection against interruption to operation and malfunc-

tion.

In distributed grounded & ungrounded systems, insulation fault location

is costly in terms of money and time. BENDER on-line insulation fault

and residual current location systems provide an innovative and

automatic solution to these problems. These comprehensive

solutions offer the user the benefits of increased system security

and safety, plus they provide significant reduction in time and cost.

• Time and cost reduction

- Automatic insulation fault or residual current location

during operation.

- Time saving thanks to exact location of the insulation fault.

- Effective support for preventive maintenance.

- No interruption to operation.

• Flexible in use

- Modular system for individual adaptation to the installati-

on.

- Flexible retrofitting and extension possibilities.

- Monitoring of up to 360 branches.

• Universal application

- EDS system for all AC/DC IT systems.

- RCMS system for all AC TN and TT systems.

- Portable location systems for small power systems and in

sub circuits.

- The EDS devices comply with IEC/EN61557-9 (draft).

Keeping everything under control - with PRC470

Provides a central control and display of the entire installation. All

monitoring parameters and important operating states are dis-

played in a text window, providing a complete overview of the

entire installation. The com-

munication between evalua-

tors and the central con-

trol/indicating device is via

a time and cost saving two-

wire

interface, which may be

easily extended.

sub distribution

infeed

main distribution

consumers

Error rate

Appl

icatio

n

x 1000

Advanced information

Insu

latio

n re

sista

nce

Time

Indication

Critical valuePersonal protectionInstallation protectionFire protection

Time gained thanks to early detection of insulation faults

An increasing number of sub circuits in an installation involves an increa-sing number of faults.

EDS470/EDS473 Ground fault location in ungrounded systems

When an insulation fault occurs in an ungrounded system, it will be

detected and indicated by the insulation monitoring device.

The ground fault location can be activated by the alarm contact

of the insulation monitor or manually. The test device PGH generates a

test signal for a defined period of time. Its amplitude and duration

are limited. This test signal flows via the location of the insulation fault

and through all measuring current transformers within the insula-

tion fault path. The EDS system scans all measuring current trans-

formers. The test signal is detected by the current transformers and

evaluated by the electronics of the EDS470-12/ EDS473-12. The

EDS with its LEDs and the PRC central controller, both provide fault

location path information.

The RCMS system operates on the principle of residual current

measurement. All conductors of the circuit to be monitored (except

the GND) are led through a current transformer. In a fault-free system

the resulting sum of all currents is equal to zero so that no voltage

is induced in the secondary winding of the measuring current

transformer. In the event of a fault current, the imbalance of the

current is sensed by the measuring current transformer and eva-

luated by the electronic circuitry.

A maximum of 12 measuring current transformers can be connec-

ted to one RCMS470-12 evaluator, i.e. 12 circuits can be monito-

red by one RCMS470-12. The RCMS470-12 scans all measuring

current transformers and indicates the faulty circuit via LED. All

RCMS units in a system work in parallel to minimise system evaluation.

The combination of an RCMS and PRC provides a central control

and display of the measuring results and a pre/main alarm war-

ning set up (10 mA-10 A), for each circuit. The use of current

transformers allows the RCMS system to be independent of both

the load current and the nominal voltage of the installation.

RF

IF

TN mit RCD

Iges

I1 I∆

Functional diagram EDS system

Functional diagram RCMS system

S

RCMS470 Ground fault current location in grounded systems

Ground fault location system EDS470

for ungrounded systems AC/DC 24...690V

•

Power supply circuits

• Systems with variable-speed drives

• Power supply systems with electricalinterference problems

T y p i c a l a p p l i c a t i o n

EDS470–12

Insulation fault evaluator which,together with the measuring cur-rent transformers, detects thePGH test signal and providesfault location indication.

• Up to 12 measuring current transformers inputs.• Alarm LED for each measuring current transformer.• Voltage-free common alarm contact.• RS485 interface.• Response value 5 mA.

Type Supply voltage US Art. No.

EDS470-12 AC230V B95012002

PGH471

Generates a defined test current signal.

• Manual or automatic testing possible.• LED to indicate the test cycle.• The operating range of the nominal voltage can be exten-ded with the coupling device AGE470.• RS485 interface.• Selectable test current 25/10 mA.


PGH471 AC230V B95018004

PRC470

For central indication and con-trol of all EDS470-12 evalua-tors via RS485 interface.

• Text display –clear indication of all essential parameters, alarm messages and simplifies set-to-work.

• Fast detection of faulty circuits.• Centralised testing function.• Easy to operate via functional keys.• RS485 interface for up to 30 EDS470-12.• Up to 360 branches can be monitored.


PRC470 AC230V B95012001

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST

RESETFAULTALARMON A4 A3 A2 A1 A0

K12K11K10K9K8K7K6K5K4K3K2K1EDS470

I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 GND IN1 IN2 IN3 IN4 O1+ O1- O2+ O2-

A B 21 22 2411

PRC470

12 14

ALARM RS485RS485

PRC470 V1.1Bender, Grünberg

DATA 1+

DATA 1-

TX 1+

TX 1-

RX 1+

RX 1-

11

(RS-485)(RS-422)

DATA 0+

DATA 0-

RX 0+

RX 0-

TX 0+

TX 0-

(RS-485)(RS-422)

(R) +Vs

(B) GND

10

RS

-422/RS

-485R

EP

EATE

RS

W2

BA

UD

RATE

1O

N1200

2O

N2400

3O

N4800

4O

N9600

5O

N19200

6O

N38400

7O

N57600

8O

N115200

A1 A2 11 14 L1 L2 L3

A B GND IN1 IN2 E

10

RS485STARTSTOPON 25mA A3 A2 A1 A0

PGH471

SLAVE ADDRESS + 110

GENERATOR

SLAVE

MASTER10mA

IN3

46810204060∞

A1 A2 L1 L2 AK

PT 21 22 24

ALARMTESTRESET

KE

11 12 14

LT1 LT2M+ M-

2

+ -ON

201

kΩ

x1 kOhmx10 kOhm~

A-ISOMETER®Serie 470

kΩMONITOR

SMO480

A B 124 121 114 111 104 101 94 91 84 81 74 71 64

A1 A2 11 14 21 24 31 34 41 44 51 54 61 64

A3 A1TESTFAULT

TESTON/OFF

RS485

PSA3

352

MES

SZAN

GE

/ CL

AMP

ON

PRO

BE

Date

nbla

tt /

Data

shee

t : T

GH1

320

Durc

hmes

ser /

Dia

met

er :

52 m

m

Art.-

Nr.

/ Ar

t.-no

. : B

980

695

max

. 1 A

600

V C

AT II

I

1000

mA

/ 0,

1 m

A ~

EDS470 System

Insulation fault location system EDS473for IT systems AC/DC 24...230V

• Control systems

• Programmable controllers

• Diode-decoupled DC-powerplants distribution systems

• Hospitals, operating theatres

EDS473–12

Evaluator which with the mea-suring current transformersdetects the PGH test signal andprovides fault location indicati-on.

• Up to 12 measuring current transformers inputs.• Alarm LED for each measuring current transformer.• Voltage-free common alarm contact.• RS485 interface.• Response value 0.5mA.


EDS470-12 AC230V B95012019

PGH473

Generates a defined test cur-rent signal which meets therequirements of most controlcircuits.

• Manual or automatic testing possible.• LED to indicate the test cycle.• RS485 interface.• Selectable test current 2.5/1m.


PGH473 AC230V B95018009

PRC470

For central indication andcontrol of all EDS473-12 eva-luators via RS485 interface.

• Text display- clear indication of all essential parameters, alarm messages and simplifies set-to-work.

• Fast detection of faulty circuits.• Centralised testing function.• Easy to operate via functional keys.• RS485 interface for up to 30 EDS470-12.• Up to 360 branches can be monitored.

TypeSupply voltage US Art. No.PRC470 AC230V B95012001


A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

A B R1 R2 l K12 K11 K10 11 12 14

onoff

RS485TEST



I∆s

SLAVE ADDRESS

MONITOR


A B 21 22 2411

PRC470

12 14

ALARM RS485RS485


DATA 1+

DATA 1-

TX 1+

TX 1-

RX 1+

RX 1-

11

(RS-485)(RS-422)

DATA 0+

DATA 0-

RX 0+

RX 0-

TX 0+

TX 0-

(RS-485)(RS-422)

(R) +Vs

(B) GND

10

RS

-422/RS

-485R

EP

EATE

RS

W2

BA

UD

RATE

1O

N1200

2O

N2400

3O

N4800

4O

N9600

5O

N19200

6O

N38400

7O

N57600

8O

N115200

A1 A2 11 14 L1 L2 L3

A B GND IN1 IN2 E

10

RS485STARTSTOPON 25mA A3 A2 A1 A0

PGH471

SLAVE ADDRESS + 110

GENERATOR

SLAVE

MASTER10mA

IN3

46810204060∞

A1 A2 L1 L2 AK

PT 21 22 24

ALARMTESTRESET

KE

11 12 14

LT1 LT2M+ M-

2

+ -ON

201

kΩ

x1 kOhmx10 kOhm~

A-ISOMETER®Serie 470

kΩMONITOR

SMO480

A B 124 121 114 111 104 101 94 91 84 81 74 71 64

A1 A2 11 14 21 24 31 34 41 44 51 54 61 64

A3 A1TESTFAULT

TESTON/OFF

RS485

PSA3

352

MES

SZAN

GE

/ CL

AMP

ON

PRO

BE

Date

nbla

tt /

Data

shee

t : T

GH1

320

Durc

hmes

ser /

Dia

met

er :

52 m

m

Art.-

Nr.

/ Ar

t.-no

. : B

980

695

max

. 1 A

600

V C

AT II

I

1000

mA

/ 0,

1 m

A ~

EDS473 System

Ground fault location system RCMS470 for grounded & high-resistance grounded systems

• Industrial systems

• Power plants

• Traffic engineering

• Electronic data processing systems

• Building services managementsystems

RCMS470–12

Residual current monitor, func-tions with the measuring cur-rent transformers, detects resi-dual current and indicates thefaulty circuit.

• Up to 12 measuring current transformers inputs. • Alarm LED for each measuring current transformer.• Voltage-free common alarm contact.• RS485 interface.• Wide response range 10mA-10A.


RCMS470–12 AC230V B94052001

PRC470

Central indication and controlof all RCMS470-12 evaluatorsvia RS485 interface.

• Text display- clear indication of all essential parameters, alarm messages and simplifies set-to-work.

• Fast detection of faulty circuits.• Remote setting of the RCMS470-12 response values.• Easy to operate via functional keys.• RS485 interface.• Up to 360 branches can be monitored.


PRC470 AC230V B95012001


A1 A2 11 12 14

0 1t/s

ALARMONTEST

RESET

21 22 24T/R

1 10x mA10 30 10

030

050

0x1

0x1

- / R

es

RCM Serie 470 MONITOR10 50 100%

T/R

M+ M- (k) (l)

A1 A2 11 12 14

0 1t/s

ALARMONTEST

RESET

21 22 24T/R

1 10x mA10 30 10

030

050

0x1

0x1

- / R

es


T/R

M+ M- (k) (l)

A1 A2 11 12 14

0 1t/s

ALARMONTEST

RESET

21 22 24T/R

1 10x mA10 30 10

030

050

0x1

0x1

- / R

es


T/R

M+ M- (k) (l)

A1 A2 11 12 14

0 1t/s

ALARMONTEST

RESET

21 22 24T/R

1 10x mA10 30 10

030

050

0x1

0x1

- / R

es


T/R

M+ M- (k) (l)

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10

TESTRESETFAULTALARMON A4 A3 A2 A1 A0

K12K11K10K9K8K7K6K5K4K3K2K1

SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14


A B 21 22 2411

PRC470

12 14

ALARM RS485RS485

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10



SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14

BMT1000

Supervisor

localindication

centralindication

RS485

RCMS470-12 RCMS470-12

PRC470

RCM475 RCM475 RCM475 RCM475

Monitoring concept with RCMS470 systemand local RCM470 devices

RCMS470 system


A B 21 22 2411

PRC470

12 14

ALARM RS485RS485


SMO480

A B 124 121 114 111 104 101 94 91 84 81 74 71 64

A1 A2 11 14 21 24 31 34 41 44 51 54 61 64

A3 A1TESTFAULT

TESTON/OFF

RS485

DATA 1+

DATA 1-

TX 1+

TX 1-

RX 1+

RX 1-

11

(RS-485)(RS-422)

DATA 0+

DATA 0-

RX 0+

RX 0-

TX 0+

TX 0-

(RS-485)(RS-422)

(R) +Vs

(B) GND

10

RS

-422/RS

-485R

EP

EATE

RS

W2

BA

UD

RATE

1O

N1200

2O

N2400

3O

N4800

4O

N9600

5O

N19200

6O

N38400

7O

N57600

8O

N115200

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10



SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10



SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10



SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14

RCMS470 MONITOR

A1 A2 K1 K2 K3 K4 K5 K6 K7 K8 K9

10



SLAVE ADDRESS

Y:

RS485

1 A500300100503010Y/mAD0D1D2

MASTER:

SLAVE

D2 D1 D0 R/- MASTER

A B R1 R2 l K12 K11 K10 11 12 14

PSA3

352

MES

SZAN

GE

/ CL

AMP

ON

PRO

BE

Date

nbla

tt /

Data

shee

t : T

GH1

320

Durc

hmes

ser /

Dia

met

er :

52 m

m

Art.-

Nr.

/ Ar

t.-no

. : B

980

695

max

. 1 A

600

V C

AT II

I

1000

mA

/ 0,

1 m

A ~

Portable systems

• For small power systems, tem-porary insulation fault or resi-dual current location

• As supplement to RCMS470,EDS470 and EDS473 systems

A p p l i c a t i o n

Overview of portable systems

EDS EDS EDS EDSPortable systems 3060 3065 3360 3365

Insulation fault (IT system) x x x x

Response value (test current) 5mA 5mA 0.5mA 0.5mA

Residual current TN system 10mA-10A 10mA-10A 10mA-1A 10mA-1A

Test device - PGH185 - PGH183

Evaluator EDS165 EDS165 EDS165-3 EDS165-3

Measuring clampsPSA3020 ø 20 mm x x - -PSA3052 ø 52 mm x x - -PSA3320 ø 20 mm - - x xPSA3352 ø 52 mm - - x xPSA3165 ø 100 mm optional optional - -

Insulation fault location systems for IT systems and

IT systems with integrated residual current measu-

rement for all earthed systems (TN/TT systems)

Portable insulation fault location systems comprising a test device, an evaluator, various measuring clamps and accessories, in a robust carrying case.

• Easy to operate with a clear text display on the EDS165 evaluator

• Measuring clamps with an internal diameter of 20/52 mm, alternatively 100 mm.

EDS3065 • For IT systems AC 24-500V/ DC 24-360V.• Test signal evaluator EDS165: 5mA.• Residual current measurement: 10mA-10A.

EDS3060 • The same as EDS 3065, but without testdevice, for EDS470 systems.

EDS3365 • For IT systems AC 24-230V/ DC 24-230V. • PGH test signal: 2.5mA/ 1mA.• Response value evaluator

EDS165-3:0.5mA.• Residual current measurement: 10mA-1A.

EDS3360 • The same as EDS3365, but without test device, for EDS473 systems.

TypeSupply voltage US Art. No.

EDS3065 AC 230V B91082004

EDS3060 AC 230V B91082006

EDS3365 AC 230V B91082011

EDS3360 AC 230V B91082013

Bender Inc.700 Fox ChaseCoatesville, PA 19320 - USATel : 610-594-8595 Fax : 610-383-7100In ter ne t : h t tp : / /ww w.bender . o r gE-mai l : i n fo@bender .o rg

Right to modifications reserved

GPW

· 21

02/0

799/

3000

SMO signal converter

The SMO480-12 connects to the RS485 interface and converts EDS470/RCMS470fault location indications to relay outputs.

Type Supply voltage US Art. No.SMO480–12 AC230V B95012011

FTC1500

For the connection of the BenderMeasuring Interface (BMS) bus tostandard field bus systemsJBUS/MODBUS, suitable for instal-lation into distribution panels,96x96mm, or for DIN rail mounting

Type Supply voltage US Art. No.FTC1500 AC230V B95012012

DI-1

Repeater for RS485 interface with electrical isolation. To extend the bus length by 4000 ft. (1200 m) and/orto extend the number of connected nodes by 32.

Type Supply voltage US Art. No.DI-1 DC10-30V B95012015

Coupling device AGE470

To extend the operating rangeof the nominal voltage of theEDS470 system in 1 ph/3ph ITsystems to AC500-690 V/DC360-690V

Type Nominal voltage UN Art. No.AGE470 AC500-690/DC440-690V B98018002

Measuring current transformers WR series

rectangular type,particulary suited for bus bar systems

Type W x H (mm)Art.No. EDS470 EDS473 RCMS470WR 70 x 175S 70 x 175 B911738 x xWR 115 x 305S 115 x 305 B911739 x xWR 150 x 350S 150 x 350 B911740 x x

Measuring current transformers WR series

split-core type,particulary for retrofitting

Type W x H (mm) Art.No. EDS470 EDS473 RCMS470WS50x80S 50 x 80 B911741 x xWS80x80S 80 x 80 B911742 x xWS80x120 80 x 120 B911743 x xWS80x160S 80 x 160 B911755 x xWS50x80S/8000 50 x 80 B911757 x

Measuring current transformerscircular type, for normal application

Type ø mm Art. No. EDS470 EDS473 RCMS470W0-S15 15 B911753 x xW1-S35 35 B911731 x xW2-S70 70 B911732 x xW3-S105 105 B911733 x xW4-S140 140 B911734 x xW5-S210 210 B911735 x xW6-S35/8000 35 B911756 x

System ExtensionsAccessories

ground fault location

Documents