Black Mamba™ Installation and Operation Guide
Page 7
Safety Features
LiquidSkyTechnologies, Inc. - Copyright 2017
Software Version LED, Pub. Ver. a1.0.10
Self-Test
Black Mamba performs a self-test during start up to ensure the unit is working properly and safely. Upon
power-up and/or at the time of charging, Black Mamba performs some or all (depending on state) of these
self-test checks:
GFCI fault detection checks for missing ground by responding to a 20mA ground fault condition
Test for missing ground
Test of the welded relay contact monitor circuit
Other tests
Ground Monitoring
Black Mamba checks ground upon power-up and constantly monitors for the presence of a proper safety
ground. (SAE J1772)
Ground Fault Interrupt
Black Mamba includes mandatory ground fault interruption with a 20ma trip in all models available for
protection against electric shock of personnel. (NEC 625.22) (SAE J1772) (UL 2231). After each GFCI
event, Black Mamba will retry charging up to 4 times after a 15-second delay per event. (UL 2231)
Stuck Relay Detection
Black Mamba checks relay contacts every time it starts to charge to ensure relays are functioning properly
and providing proper power interlock.
EV Identification
Black Mamba verifies the pilot signal integrity by checking the EV diode. The pilot signal must be at
BOTH the correct resistance AND pass the “diode check” to activate the circuit. (SAE J1772)
Ventilation Required
Black Mamba checks for the EV ventilation required request. Black Mamba will deny charging if
ventilation is unavailable or allow charging if the charging station is equipped to activate ventilation.
(SAE J1772)
Note:
This safety feature is commonly left out of many other commercial charging
stations.
Note:
This safety feature is commonly left out of many other commercial charging
stations or implemented with a warning label only.
