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8. COMMISIONING
8.1.
Thermal resistance
The relay can support, with 3-phase balanced injection, the following values according to
International Standards:
•
4 times rated current continuously.
•
20 times rated current for 10s.
•
80 times rated current for 1s.
In the following table the different injection modes are described:
CURRENT
GENERATION
INJECTION
MODE
INJECTION
SYSTEM
RELAY
REAR
CONNECTION
RELAY
WITHSTAND
ENERGY WAVEFORM
Single phase
Phase-
Neutral
NOT APPLY
P-N:
Phase-
Phase
P-P:
Three phase
Phase-
Neutral
Balanced (120°)
Unbalanced (0°)
P-N Balanced:
P-N Unbalanced:
= 2x
= 4x