White Outdoor 778 Instrukcja Obsługi Pobierz pdf (Strona 56)

30.7 Unless the meter is being used to measure leakage from one part of a pump to another, the meter

is to be connected between the accessible parts and the grounded supply conductor.

30.7.1 A submersible pump is to be tested for leakage current while submersed in a tank ﬁlled with water.

The top of the pump is to be at least 12 inches (305 mm) below the surface of the water during the test.

The test tank shall be isolated from ground and the meter is to be connected between the grounding

conductor and the grounded supply conductor of the ﬂexible supply cord.

30.7.1 added March 29, 1999

30.8 A sample of the pump is to be tested for leakage current starting with the as-received condition with

all switches closed, but with the grounding conductor open at the attachment plug. The as-received

condition is without prior energization except as may occur as part of the production-line testing. The

supply voltage is to be 120 or 240 volts as appropriate, depending upon the rated voltage of the pump.

The test sequence, with reference to Figure 30.1 is to be as follows:

a) With switch S1 open, the pump is to be connected to the measuring circuit. Leakage current

is to be measured using both positions of switch S2, and with the pump switching devices in all

normal operating positions.

b) Switch S1 is then to be closed, energizing the pump, and within 5 seconds, the leakage

current is to be measured using both positions of switch S2, and with the switching devices on

the pump in all their normal operating positions.

c) Leakage current is to be monitored until thermal stabilization. Both positions of switch S2 are

to be used in determining these measurements. Thermal stabilization is to be obtained by

operation of the pump as in the normal temperature test.

30.9 Normally, the complete leakage-current test described in 30.8 shall be conducted without

interruption for other tests. However, with the concurrence of those concerned, the leakage-current tests

may be interrupted for the purpose of conducting other nondestructive tests.

30.10 A permanently connected pump need not be subjected to the leakage current test if all accessible

metal parts are connected to the grounding means.

SEPTEMBER 28, 2000MOTOR-OPERATED WATER PUMPS - UL 77840

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White Outdoor 778 Instrukcja Obsługi Strona 56