Earth Leakage Detector

TYPE 905 – B2 as per RDSO/SPN/256/2002

Earth Leakage Detector

All the channels of the equipment continuously monitor the Leakage Resistance of the system w.r.t Earth and an alarm is actuated along with a visual Indication when the leakage resistance value drops to the pre-set value. Each such fault is recorded on a 6-digit counter. Fault detection can be set in between 2K-1MΩ. The audio alarm is common for all Channels while the visual indication is separate for each channel.

The Basic unit of ELD comprises of 4 channels for use on signaling circuit of 110V AC or 110V/60V/24V/12V DC (as required by the customers). In case of requirement for less number of channels, unused channels are covered with dummy plates while the inner wiring remains the same and these dummy plates can be replaced by channel modules if and when required in future. For more than 4 channels, say 8 or 12 channels, add on units are provided to be connected to the basic unit with suitable interconnecting cable/s and switches. The equipment also consists of an insulation resistance meter which can be connected to any individual circuit to indicate the actual value of the insulation resistance of the signaling circuit during un-energized condition i.e. off-line condition.

TECHNICAL SPECIFICATIONS:

AC Mains	110 V /230V AC,
Signaling Supply	11 0V AC or 12V to 110V DC
Leakage Setting Range	2K 1M through a helical potentiometer.
Meter Range	2K 10M on analog meter with wide scale.
Terminals provided for	Remote indication, Remote Buzzer & Relay Contacts
Meter Range	2K 10M on analog meter with wide scale.
Power Consumption/ (Current Load at 110V)
4Ch ELD 37 VA	8Ch ELD 61 VA	12Ch ELD 88 VA	16Ch ELD 115 VA	24Ch ELD 176 VA
Controls and Indications
Main Panel
Mains	Red Neon Lamp
Channel Selector	To select meter for particular channel /Insulation and Setting
Set Reference	Potentiometer switch to select leakage Resistance Value to set reference
Mute	Push switch to mute the Alarm
Channel Panel
Normal	Green LED
Channel Set Ref	Amber / Yellow LED
Fault	Red LED
Bus Bar voltage presence	Green LED
SET REF POT	Pot to set reference in conjunction with Potentiometer on Main Panel
Dimension	Standard 19” sub rack, (483W X 360D X 145H in mm) with Handles & Feet
Weight (Basic Unit)	9.5 Kg.
INSULATION RESISTANCE METER
Reference Setting Range	Either of 500K, 1M, 1M5, 2M, 5M, 10M
Meter Range	500K 50M
Visual Indication	Pair Energized Green/White LED Low Insulation Red LED.

• ELD 4 Channel : 905 B2-4C
• ELD 8 Channel: 905 B2- 8C
• ELD 12 Channel: 905 B2 -12C
• ELD 16 Channel: 905 B2- 16 C
• ELD 24 Channel: 905 B2 -24 C