FED-STD-228A
Method 6111.1
18 APRIL 2014
VOLTAGE WITHSTAND, INSULATED WIRE AND CABLE
1. SCOPE
1.1 This method is intended for use in determining whether the insulation over a metallic conductor will
withstand a specified voltage without rupture. The voltage withstand test should be conducted under the
supervision of an inspector in the plant of the manufacturer of the cable.
2. SPECIMEN
2.1 The specimen should consist of one or more coils or reels of finished insulated wire or cable or an
equal length of insulated wire or cable taken after the vulcanization process but before the braiding or
finishing operation.
3. APPARATUS
3.1 The apparatus shall be as follows:
3.1.1 A suitable container equipped with stirrer in which the specimen may be immersed in water.
3.1.2 A suitable grounding electrode or the equivalent (which may be the surface of a tank if metal and
not insulated from the water).
3.1.3 A circuit-breaker and a suitable means for indicating the current flow in the test circuit.
3.1.4 A suitable source of power of not less than 5 KVA, having a frequency not greater than 100 and not
less than 25 cycles per second and a testing transformer, the output voltage of which can be adjusted
and which shall provide a test voltage having a wave form approximating a sine curve as closely as
possible.
3.1.5 A suitable means for measuring the secondary or high voltage side of the transformer such as a
tertiary coil and voltmeter, an electrostatic voltmeter, or a potential transformer with suitable low-voltage
indicator.
3.1.6 The assembled apparatus shall be such that the capacity of the test circuit supply will be adequate
to maintain the required test voltage without overheating the test equipment.
4. PROCEDURE
4.1 The voltage withstand test shall be conducted on the specimen before the insulation resistance test,
method 6031.
4.2 The test voltage shall be as specified in the detail specification of specification sheet.
4.3 Unless otherwise specified in the detail specification or specification sheet, the test voltage shall be
applied for a period of 1 minute from the time the specified voltage has been reached.
4.4 The test voltage shall have a frequency not greater than 100 nor less than 25 cycles and shall have a
wave form approximating a sine curve as closely as possible.
172
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business