For ungrounded system


The JSC-88 Is a very reliable way to establish with certainty whether or not there is voltage present downstream from the switches or
breakers during power-offs. It dramatically increases the safety of personnel assigned to maintenance work on electrical equipment
powered by three-phase voltage. If voltage is present downstream of the breakers, one or more (LEDs) on the JSC-88 will stay lit. As
soon as one of the 3 LEDs are lit, the remote KLQ-Kit LED lights up. A simple visual inspection tells you whether the electrical system
is in “Zero energy” mode.

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JSC-88 by Controlab INC

Technical sheet of Voltage Detector – JSC-88

The JSC-88’s small design allows for direct installation on the door of the switch board, the starter or the control panel. Our voltage detector is now widely used by many companies concerned about the safety of their employees. Important note: If one or more LEDs remain lit, this means that the JSC-88 is detecting the presence of voltage and that the situation is definitely dangerous. A qualified electrician should then look into the cause of the problem and take appropriate corrective measures. There is no automatic link between a given LED and a particular phase. The JSC-88 was not designed to detect phase loss, but rather the presence of a problematic voltage in an industrial environment.
▶High quality design and small size
▶Two (2) year warranty
▶CSA and UL certified
▶Fully cast in epoxy
▶NEMA-4X detector (standard)
▶Protective cover is included
Works under three-phase voltage
Operating voltages: 120 to 600 V
Operating frequency: 50/60/400 hz
Current consumption: 1.9 Ma
Dimensions: 72 mm × 51 mm × 26 mm
Included: standard 4-foot KIT-K6 voltage step-down
upon request: Single-phase, bi-phase, ungrounded DC

Easy installation

The JSC-88 voltage sensor is fully calibrated in our laboratories and therefore delivered completely ready for operation. Installation takes about 10 minutes per device and can be carried out by anyone. Watch this video to learn how.

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Controlab products (phase imbalance detectors, voltage detectors, ground fault monitors) are sold through a network of distributors and OEMs covering all of North America. For questions or comments about Controlab products, please contact us.

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