02 4047 0777
www.mercs.com.au
02 4047 0788
MerCs Pty Ltd, 55 Pendlebury Rd, Cardiff, NSW, 2285, Australia | 2018 V1.1
Earth Leakage Relay
User Manual
ME-ELF-AF
•
Adjustable sensitivity
•
Adjustable time delay
•
LED Status indicators
•
Leakage current indication
•
Remote test and reset switching
•
DIN rail mounting
•
Current measurement based on fundamental frequency, prevents nuisance tripping
•
Dial adjustment for ease of use
•
Robust casing protects the unit from external interference
Features
The MerCs ELR series of earth leakage relays ensures the protection of
electrical installations and persons against direct and indirect contacts.
The ME-ELR-AD model provides real-time leakage current display and
has a 50% pre-fault contact.
Description
Applications
•
Industrial equipment protection
•
Personnel protection from Earth Leakage faults
•
Suitable for low voltage distribution protection
Technical Data
Indicator
Status
AUX
TRIP
DELAY
Off
Off
Off
No auxiliary power supply
On
Off
Off
System normal, no tripping
On
Off
On
Trip start, time delay count-
down started
On
On
Off
Earth leakage tripped
On
On
Blink
ME-T not connected
Light Indicators
(ii) Leakage indicators
The earth leakage indicators indicate the amount of leakage
current detected and are expressed as percentage of the set
current.
•
10% - leakage current ≥ 10% of set current
•
20% - leakage current ≥ 20% of set current
•
40% - leakage current ≥ 40% of set current
•
60% - leakage current ≥ 60% of set current
•
80% - leakage current ≥ 80% of set current
(i) Status indicators
The light indicators display the status of the system
