Bender LifeGuard ® LG2 series protective panel

Question 2: Install LifeGuard ®  What are the key requirements for wiring and installation in the LG2 series? What compliance standards should be followed?

Answer: The key installation and wiring requirements are as follows: ① Wiring requirements: Use only copper wires, rated at 60 ℃ or above for<100A, and rated at 75 ℃ or above for 100A; All active conductors (including neutral wires) must pass through the current transformer, and the grounding wire must be directly connected to the grounding terminal, without passing through the transformer; ② Installation requirements: The shell should be wall mounted and fixed, with cable holes at the bottom and NEMA 4X connectors used; Only the backplane version needs to be installed inside the cabinet, with a vertical gap of 152mm for<100A and 203mm for 100A; ③ Compliance specifications: must be installed by licensed electricians, following local, state, and national electrical regulations, and complying with UL 508A industrial control panel standards; Separate isolation switches and overload protection devices need to be configured.

Question 3: LifeGuard ®  What are the testing and reset operations for the LG2 series? What is the difference in operation between the digital display model and the regular model?

Answer: There are two ways to test and reset: ① Local operation: For ordinary models, the TEST (long press ≥ 2 seconds) and RESET (long press ≥ 1 second) buttons on the panel are used to achieve this; Long press TEST to display "tES" and RESET to display "rES" for digital models; ② Remote operation: Only the digital version supports connecting to the MK1500-D remote indicator, which can be achieved through its built-in button or external button. Operational differences: ① Testing process: Ordinary A/F grades require a 10 second self check, while D/E grades can be reset directly; The digital model has no self check waiting and must trip within 15 seconds; ② Function display: The digital version can view the grounding fault current in real time, and the LED bar chart indicates the risk of tripping. The ordinary version only indicates the status through a two-color LED; ③ Release level: The digital version is fixed at 6mA, while the regular version has four release levels: A/F/D/E. Please refer to the product configuration.