ABB RET670 Commissioning Manual

4. Compare the result with the set value and make sure that the new injected 3I
0
· cos φ
is equal to the setting INcosPhiPU..
Take the set characteristic into consideration, see Figure 45 and Figure 46.
5. Measure the trip time of the timer by injecting a current two times the set
INcosPhiPU value and the polarizing voltage 1.2 · VNRelPU.
Tinv
I V
test
=
⋅
⋅ ⋅
( )
TDSN SRef
3 3
0 0
cos ϕ
ANSI13000294 V1 EN (Equation 77)
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Set the polarizing voltage to zero and increase until the boolean output signal
UNREL is activated, which is visible in the Application Configuration in PCM600
when the IED is in online mode. Compare the voltage with the set value VNRelPU .
8. Continue to test another function or complete the test by setting the test mode to
Disabled.
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 185
Commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24