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B10E AC/DC Voltage Power Supply (Trip Coil Tester)

The Megger B10E provides a reliable & stable power supply for circuit breaker testing / a ripple-free variable DC voltage that can easily accommodate a high, variable load.

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Megger B10E Trip Coil Tester AC/DC Voltage Power Supply

A variable DC voltage is needed to test a circuit breaker. Substation batteries should not be used since this entails considerable risk for testing personnel and for both the testing equipment and the equipment under test. 

This Megger power supply unit, B10E, is used to supply voltage to the Circuit Breaker coils and spring-charging motors during installation and/or field service. Since the high-quality voltage available at the coil outputs is very load-independent, the power supplied resembles what is encountered under normal operating conditions. Circuit breaker functionality thus remains virtually unchanged. B10E enables you to test Circuit Breaker functions easily at the specified voltage levels.

The best way to check whether or not solenoids and protective mechanisms are sluggish or set improperly is to perform a test at minimum tripping voltage. The minimum trip voltage test is described in a number of international and national standards such as IEC 62271-100, ANSI C37.09 etc.

Megger B10E DC voltage power supply can be used to test breaker coils in this manner, by providing a ripple-free variable DC voltage which can easily accommodate a high, variable load.

Megger B10E Key Features:

  • Reliable and stable power supply for circuit breaker testing
  • Continuously variable 24-250 V AC or  DC output
  • Separate outputs for close coil, trip coil and spring charging motor voltage
  • Direct triggering for minimum trip voltage testing
  • Operate with a breaker analyser for efficiency in testing sequence


Technical Specification for: Megger B10E AC/DC Voltage Power Supply (Trip Coil Tester)

Application fieldMedium and high-voltage substations / industrial environments
Operating temperature0 to 50°C (32 to 122°F)
Storage-40 to +70°C (-40 to +158°F).
Humidity5% to 95% RH, non-condensing
Mains voltage115 / 230 V AC, 50/60Hz
Power consumption3300W
ProtectionThermal cut-outs, +80°C
Short-circuit protectors at DC outputs
Measurement Section
Voltmeter - digital
Range0 – 300 V DC, 0 – 300 V AC
Resolution1 V
Inaccuracy±1% of displayed value, DC
±2.5% of displayed value, AC
Current shunt5 A / 50 mV ±0.5% (built-in)
Test Lead Set, with 4mm Stackable Safety Plugs2 x 0.25 m (0.8ft), 2.5 mm²
2 x 0.5 m (1.6ft), 2.5 mm²
8 x 2 m (6.6ft), 2.5 mm²
DimensionsInstrument: 35 x 27 x 22 cm
Transport case: 61 x 29 x 36 cm
Weight20.8 kg
29.3 kg with accessories; transport case
Megger B10E warranty1 year
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