Model L3447
A pparatus Emax DC
S cale
D 1SDH000635R0002
Page No.3 Powering the PR122/DC and PR123/DC units via the PR120/V-PR120/LV module
The PR122/DC and PR123/DC units are powered the MEASURING module via the busbar voltage.1.Modules
14.1.
The following tables show the voltage values the MEASURING module's input for which the relays and modules are enabled:
PR122/DC and PR123/DC Relay PR120/K Module
ENABLING Enabling threshold (Voltage)
PR122-PR123/DC Relay PR120/K Relay display backlighting PR120/V PR120/LV
S
60V 18V
IB 90V 24V
N.2 Front view
- "Power Line" LED (lit when busbar voltage
is On, see 14. The PR120/V-PR120/LV used for voltages from 100V 1000V, the PR120/
LV used for voltages from 24V 48V.
14.
At the end the procedure, make sure that the Power line LED on. The module comes with "Power" LED and sealable isolator for dielectric
stiffness tests.
14.B.1.
77/108
MEASURING
r Rawer
. The measurements are sent the module the protection release, enabling
the implementation set protection and measurement functions.1 120/V-PR 120/LV EAS odule
14. The module also enables the relay powered.
After performing dielectric stiffness test, restore the isolator its original position turning clockwise until you reach
the opposite end stroke, because all the voltage protections are disabled while the isolator the test position.3)
- Isolator
Isolator
\
A Before performing the dielectric stiffness test essential turn the isolator into the Test position mode turning
the screw anticlockwise until you reach the end stroke position. The PR120/V-PR120/LV module does not need any connections made the customer.1 General characteristics
The MEASURING module records and processes the voltages.1
