Bender LifeGuard® LG2-Series Protection Panels

Bender LifeGuard ®  LG2-Series Protection Panels

Product Overview

Bender LifeGuard ®  The LG2 series is an industrial grade ground fault protection panel launched by Bender. Its core mission is to monitor the ground fault current in the circuit in real time, and quickly cut off the load power supply when the current reaches the preset trip threshold, avoiding safety risks such as electric shock and arc flashover. The product is suitable for industrial circuits with multiple voltages and phases, providing flexible installation forms and trip level selection. It strictly follows the UL 508A industrial control panel standard and is widely used in factory equipment, industrial control systems, and other scenarios that require extremely high electrical safety.

Core parameters and specifications

Category specific parameters

Adaptation voltage  120VAC、208VAC、208/120VAC、240/120VAC、480VAC、480/277VAC、600VAC、600/347VAC

Circuit phase 1ph (2w/3w), 3ph (3w/4w)

Rated current ＜ 100A, 100A

Release level F: Fixed 6mA; Level A: Adjustable on-site (default 30mA)

Shell type NEMA 4X polycarbonate, NEMA 4X stainless steel, backplate only (requires self provided cabinet)

Dimensions (length × width × depth) ＜ 100A: 305 × 254 × 152mm (12 "× 10" × 6 "); 100A: 406 × 356 × 203mm (16" × 14 "× 8")

The wire requirement is only copper wire; <100A requires ≥ 60 ℃ (140 ℉) rating; 100A needs to be rated at ≥ 75 ℃ (167 ℉)

Installation and wiring specifications

（1） Installation requirements

Installation of shell:

NEMA 4X polycarbonate/stainless steel casing with wall mounting feet, separate wall mounting instructions must be followed;

It is recommended to use NEMA 4X or higher grade connectors at the bottom of the casing for cable perforation to maintain the protection level.

Only for backplate installation:

It needs to be installed in a compliant cabinet, with vertical clearance requirements of 152mm (6 ") for<100A and 203mm (8") for 100A;

Fix with 4 # 10 screws, with a mounting hole diameter of 6.4mm (1/4 ").

（2） Wiring rules

Installation must be carried out by licensed electricians, following local, state, and national electrical regulations;

All active conductors (including neutral wire N) need to pass through a current transformer and be connected to the incoming side of the contactor;

Connect the load or protected branch to the outgoing side of the contactor;

The incoming and load grounding wires must be connected to the backplane grounding terminal and must not pass through the current transformer;

The number of conductors and wiring diagrams corresponding to different voltages are as follows:

Reference wiring diagram for voltage specification, number of conductors (excluding grounding)

120 VAC 1ph/2w（L1、N） Figure W1

208 VAC 3ph/3w（L1、L2、L3） Figure W2

208/120 VAC 3ph/4w（L1、L2、L3、N） Figure W3

240/120 VAC 1ph/3w（L1、L2、N） Figure W4

480 VAC 3ph/3w（L1、L2、L3） Figure W2

480/277 VAC 3ph/4w（L1、L2、L3、N） Figure W3

600 VAC 3ph/3w（L1、L2、L3） Figure W2

600/347 VAC 3ph/4w（L1、L2、L3、N） Figure W3

Core functions and operating procedures

（1） Release level and range adjustment

Release level, release current adjustment method, current sensor range setting (potentiometer)

F-class fixed 6mA non adjustable --

A-level on-site adjustable (default 30mA) potentiometer adjustment CTUB101-CTBC35P ≤ 100mA: left position (8 o'clock direction); >100mA: median (12 o'clock direction)

（2） Basic operations

Power on: Close the circuit breaker/isolation switch on the incoming side, and the green POWER ON LED will light up when there is no ground fault;

Test (F level, fixed 6mA):

Press and hold the TEST button for ≥ 2 seconds, the device will trip, the red CIRCUIT TRIPPED LED will light up, and the load will be powered off;

After internal self check for about 10 seconds, press and hold the RESET button for ≥ 1 second to reset the device and restore power supply;

Test (Grade A, adjustable on site):

Press and hold the TEST button for ≥ 2 seconds, the device will trip, and the red LED will light up;

Press and hold the RESET button for at least 1 second to reset the device and restore power supply;

Range adjustment (Class A only):

Adjust the potentiometer according to the trip setting of RCMA420-D-2, with the corresponding range as follows:

Release current range, effective value measurement range, peak measurement range

I∆n ≤0.1A 0~450mA 0~900mA

0.1A＜I∆n ≤0.5A 0~0.75A 0~3.5A

Safety and Compliance

Before installation, all power sources must be disconnected to avoid the risk of electric shock and arc flashover;

Separate isolation switches, branch protections, and/or overload relays need to be configured;

The three-phase three wire system can adopt direct grounding or resistance grounding methods;

Equipment troubleshooting and parameter adjustment should refer to the technical manual for protective relays (available online).