MIL-PRF-83383E
4.6.8 Overload cycling (see 3.11). RCCB's shall be subjected to a 200 percent rated current resistive load for 100
cycles of normal openings and the tripping times shall be measured. This test shall be conducted at rated
voltage and, unless otherwise specified (see 3.1), at a cycling rate of 2 to 3 minutes per operation. Following
this test, RCCB's shall be subjected to the minimum and maximum ultimate trip calibration tests specified in
4.6.4. Triple pole RCCB's are to carry minimum and maximum ultimate trip currents on all three poles
simultaneously.
4.6.9 Endurance (see 3.12). RCCB's shall be subjected to the number of cycles of make and break operation
specified (see 3.1), with the RCCB's energized at rated current, voltage, and frequency (see 3.1, 4.6.9.1,
and 4.6.9.2) throughout the cycling period with a duty cycle specified in table VIl. All poles of triple pole
RCCB's shall be simultaneously subjected to the required load. Auxiliary
(NOTE: Non-operate events will not be considered test failures. Non-operate events are to be defined as a
failure of the device to close and latch the primary contacts in the relay mode. This type event shall be
constrained to less than one percent per thousand cycles and cannot occur on consecutive cycles.
Additionally, less than one hundred non-operate events will be tolerated over the endurance cycling period.)
The same type of load shall be applied to the auxiliary contacts as is applied to the main contacts, except
when the motor load is applied to the RCCB, the auxiliary contacts shall be subjected to the inductive load.
Electrical operation of the RCCB shall be by use of the I/CU or other contact in series with the I/CU. RCCB's
shall be inspected for evidence of mechanical damage or loosening of parts. Following the test, RCCB's
shall be subjected to the following tests:
Minimum ultimate trip calibration (see 4.6.4): Triple pole RCCB's are to carry minimum and maximum
a.
ultimate trip currents on all three poles simultaneously.
Maximum ultimate trip calibration (see 4.6.4): Triple pole RCCB's are to carry minimum and maximum
b.
ultimate trip currents on all three poles simultaneously.
Voltage drop (see 3.8).
c.
TABLE VlI. Duty cycle for endurance tests (seconds).
Resistance
Inductive
Motor 1/
Lamp 2/
ac or dc
ac or dc
ac or dc
ac or dc
ON
OFF
ON
OFF
ON
OFF
ON
OFF
3.0 ±.5
3.0 ±.5
1.0 ±.05
4.0 ±.1
.5 ±.09
4.5 ±.1
2 ±.05
15 ±2
1/ Duration of the specified inrush current shall be 0.07 ±0.02 second, after which it shall be reduced to
its rated motor load for the remainder of the "ON" period.
2/ Duration of the specified inrush current shall be 0.015-0.020 second, after which it shall be reduced
to its rated lamp load for the remainder of the "ON" period.
4.6.9.1 AC loads. During the ac endurance tests, the voltage shall be 120 ±5 volts and the frequency shall be 400
±20 Hz.
a. Resistive load: Testing shall be accomplished at rated load with a power factor between .9 and
unity.
b. Inductive load: Testing shall be accomplished at rated load with a 0.7 ±0.05 lagging power factor.
c. Motor load: The RCCB shall make five times rated load and break rated load.
d. Lamp load: Lamp operation shall make 12 times rated load and break rated load.
19
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business