Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
101
Appendix D Integrated Protective Maintenance Grounding Device
The auxiliary contacts are factory adjusted and should not require
readjustment in the field. The electrical configuration of the auxiliary contacts
is shown below.
Figure 89 - Standard, 2- Form C Auxiliary Contact Configuration
IPMG Specifications
Table 5 - Specifications
Description
Rating
Maximum operating voltage
7.2 kV (±5%)
Operating frequency
50/60 Hz
Rate impulse voltage withstand (BIL)
(1)
(1) The wave-shape must be 1.2/50 µs similar to those as defined in IEC 60060-1 and UL 347.
60 kV
Rate 1-second voltage withstand
22 kV
Rate 1-minute voltage withstand
20 kV
Rated short time withstand current
31.5 kA rms
Short time withstand duration
4 s
Rate peak current
80 kA rms
Mechanical duration grade
M1
Mechanical endurance (operations)
2000
Torsional strength
1600 N
Mean time to failure (MTTF)
>20 years
Clearance between open contacts
>125 mm (4.9 in.)
Contact pressure
400±30 N
Movable blade and ground electrode center-center distance
116.5 mm (4.6 in.)
Approximate handling close operation force (<1°)
≤
250 N
Approximate handling open operation force (<1°)
≤
250 N
Approximate handling close operation force (<15°)
≤
450 N
Approximate handling open operation force (<15°)
≤
450 N
Loop resistance
≤
75
μΩ
Method of operation
Rotational, snap action
Rotational degrees for change of state
90º ±5
Maximum difference between all three-phase closing
≤
3 mm (0.12 in.)
Quantity of mounting holes
8
Mounting hole (slotted) diameter
9 x 18 mm (0.4 x 0.7 in.)
