ELR96 Earth Leakage Relay User'S Guide

ELR96 Earth Leakage Relay User’S Guide

A BRIEF OVERVIEW

a – Auxiliary power supply indicator

b – Relay trip status indicator

c – Time delay status indicator

d – Down key

e – Up key

f – Reset key

g – Test key

h – DP indicator

i – FUNCTION indicator

j – VALUE indicator

1. DESCRIPTION

：

The ELR96 and ELR96A are microprocessor based numerical earth leakage relays designed to monitor

the leakage current in a electrical installation. With the use of microprocessor technology and digital signal

processing technique, the ELR96 and ELR96A relays are equiped with state-of-the-art digital hormonic

filter to minimise nuisance tripping.

The ELR96 & ELR96A relays can continuously display the leakage current on the front display panel.

When the relay trip as a result of a leakage being detected, the leakage current will be recorded. This reco-

ded leakage current and all the settings on the relay can be viewed at by pressing the RESET button on the

relay.

ELR96A comes with two additional remote control inputs.The additional inputs are remote test input and

the remote reset input. Other additional features of the ELR96 include positive safety output contact and 50%

pre-fault contact.

2. LIGHT INDICATORS

：

The indicators display the status of the system as follow：

Indicator

Status

0 0 0 0

1 0 1 ×

1 B 0 ×

1 0 ×

1 0 ×

0

×

B

NO auxiliary supply. 1 = NO

0 = OFF

Leakage current exceeded set limit,

X = Don’t care

time delay coundown started.

Delay time lapsed and relay tripped.

B = Blinking

VL = VALUE

FUNC = FUNCTION

Table 1：system status -1-

FUNC DP

OFF

VALUE

OFF Real-time leakage current.

1 Blink Sensitivity setting.

2 Blink Delay time setting.

Step 2：Press the UP and DOWN key simultaneously to enter

Programming mode. The function digit blinks to indic-

ates the relay is in programming mode.

Step 3：Use the UP or DOWN key to select the desired value.

3 Off Previous tripped leakage current. Step 4：TO save the selected value, press the UP and DOWN

Table 2：function codes key simultaneously. This will exit the programming

mode with the selected setting being saved.

Message Description

“E Ct” Error in ZCT connection TO exit programming mode without saving the selected setting,

Overflow . The measurement exceeded press the “RESET” key once.

the display range for the respective

sensitivity setting range.

“OFL”

Display range for sensitivity setting range

1：From 0.00A to 0.22A

Display range for sensitivity setting range

2：From 0.00A to 1.10A

4. REMOTE CONTROL INPUTS *

a) Remote test input

This digital input is similar to the “ TEST ” pushbutton.

To remotely test the relay, make a connection between

Display range for sensitivity setting range

3：From 0.00A to 3.10A

terminals 4 and 6 of the relay.

b) Remote reset input

“tESt ” Relay tripped under test mode This digital input is to remotely reset the relay when

Table 3：Display messages tripped. To reset the relay, make a connection between

terminals 4 and 5 of the relay.

3. PUSH-BUTTONS OPERATION

a) Trip test

Press the “TEST ” button to simulate a trip.

5. OUTPUT CONTACTS

a) Trip contact：

Condition.

b) Trip test

Press the “TSET” button to reset the relay

when tripped.

This is a latching type contact. It is activated under foll-

owing conditions：

- broken connection between the relay and the ZCT.

- leakage current exceeded the sensitivity setting.

c) View setting b) 50% pre-fault contact *

When the relay is not under tripped condition, pressing - Activated when leakage current reaches 50% of the

the “RESET” button will scroll through the various sensitivity setting.

functions of the relay.

OFF

€ FUNCTION 1 € FUNCTION 2 € FUNCTION 3

Figure 1：Scroll sequence

d) Program setting

Only function codes 1 and 2 can be programmed.

Setp 1：Press “RESET” key until the function digit

c) Safety contact *

- Activated when the auxiliary supply is connected and

the relay is functioning normally.

- De activated when connection to the ZCT from relay

is interrupted or auxiliary supply failure.

Shows required function.

-2-

6. TECHNICAL DATA

Models

ELR96-5 & ELR96A-5

ELR96-5 & ELR96A-6

Auxiliary Supply

Supply voltage

Rated frequency

VA rating

Setting

Sensitivity Adjustment

Delay Time Adjustment

Remote test /Reset inputs

Output

Trip Contact：

Rated voltage

Continuous carry

Make and carry for 0.2s

Safety Contact：*

Rated voltage

Continuous carry

Make and carry for 0.2s

50% Pre-fault Contact *

Rated voltage

Continuous carry

Make and carry for 0.2s

Contact specification：

Contact arrangement

Contact material

Operating time

Expected electrical life

Expected mechanical life

Approval

Indicators

Auxiliary supply

Time delay

Trip

Real-time leakage current

：50Hz

：60hz

：198～265 VAC

：OR 50Hz

：3 VA typical

：Range 1 is stepping from 0.03A € 0.05 € 0.10A € 0.15A

：Range 2 is from 0.20A to 0.75A in step of 0.05A

：Range 3 is from 0.80A to3.00A in step of 0.05A

：From 0.05 to 3.00 sec in step of 0.05 sec

：From 3.00 to 10.0 sec in step of 5.0 sec

：N.O.dry contact *

：250 VAC

：6A (COSψ=1.0)

：30A

：250 VAC

：5A (COSψ=1.0)

：10A

：250 VAC

：5A (COSψ=1.0)

：10A

：change-over

：Silver alloy

：15ms max.

：100,000 operations at rated current

：5 million operations

：UL / CSA，VDE，TUV

：green color LED indicator

：red color LED indicator

：7-segment LED and red color LED indicator

：7-segment LED

-3-

Mechanical

Mounting method

Front panel

Approximate weight

* Applicable to ELR96A series only

7. CONNECTION DIAGRAMS

8. CASE DIMENSIONS

：Panel mounting

：Standard DIN 96mm × 96mm

：0.8 kg