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What is the operating voltage tolerance, catalog numbers, and clearing times for the Masterpact NT and NW shunt trip and shunt close coils?

Published date: 27 May 2020

Issue:  
What is the operating voltage tolerance, catalog numbers, and clearing times for the Masterpact NT and NW shunt trip and shunt close coils?

Product Line:
Masterpact NT NW

Resolution:
Shunt trip:  operating threshold is 0.7x to 1.1x Vn (nominal voltage)
Shunt close:  operating threshold is 0.85x to 1.1x Vn
Catalog numbers are the same for MX and MN (shunt trip and shunt close) devices; function is determined by placement in the breaker.
 
Voltage (V) at 50/60 Hz T-, W-, & Y-Frame Fixed T-Frame Drawout W- & Y-Frame Drawout
12 DC S47359 S33809 S48490
24-30 AC/DC S47360 S33810 S48491
48-60 AC/DC S47361 S33811 S48492
100-130 AC/DC S47362 S33812 S48493
200-240 AC/DC S47363 S33813 S48494
277 AC S47364 S33814 S48495
380-480 AC S47365 S33815 S48496

MX operating time at Vn:  50 ms ±10 (NW and NT)
XF operating time at Vn:  
70 ms ±10 (NW ≤ 4000 A)
80 ms ±10 (NW > 4000 A)
55 ms (NT)

NOTE:  Shunt trip (MX) and shunt close (XF) circuits must be energized for a minimum of 200 ms. In other words, don't use an impulse signal. Use a signal of at least 200ms.

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