TAVRIDA ELECTRIC Rec15/25 Al1 5p, User Manual, Page: 55 / 136

55
Figure 56
NEMA4 connector with bird protection
All technical parameters are met without the protective covers installed.
Protective covers and NEMA terminals allows multidirectional primary line wires-to-terminals connection.
4.2.5.4
Burndy® NEMA2 Connectors
Two-hole Burndy
®
connectors (Figure 57) provide a reliable connection to power line of any type of
conductors treated correspondingly. The connectors are made of Sn-Bi coated brass.
Figure 57
Two-hole
Burndy® NEMA connector
Connecting RC5_4 to Auxiliary Supply 4.2.6
ATTENTION! Auxiliary supply VT connection wire should not be earthed inside the VT secondary
compartment.
Before the auxiliary supply from a pole mounted VT is connected to the RC5_4, resistance measurement
should be performed. Switch digital Multi-meter to the Ohm metering mode and enable beeping signal.
Connect one electrode to the earthing bar (with the connected VT base earthing bar) and second electrode
to both connection wires (one by one or to both of them simultaneously). Resistance should be infinite,
sound signal should not appear.
Resistance measurement is not performed in case an external AC/DC supply is used.
ATTENTION! Corresponding AC1 and AC2 earthing jumpers should be removed before external AC/DC
source with predefined neutral is connected to the RC5_4.
After the main line is powered, the commissioning engineer should make sure that the auxiliary supply is
connected correctly. The auxiliary supply voltage should be checked by digital voltmeter.