Motor-cum-Hand Driven Insulation Tester

About.

The CIE/777 HM combines mains-motor drive with a collapsible hand-crank backup in one instrument. It shares the same motor-driven sustained-voltage capability as the CIE/777 for polarization index (PI) and dielectric absorption testing, while the centrifugal governor (clutch) on the hand-driven circuit ensures constant output voltage when operating by hand crank where mains power is unavailable. The collapsible generator handle is specific to the 777 HM - it is not present on the plain CIE/777. Weight is 12 kg (including top cover), notably heavier than the 777's 9 kg due to the additional hand-drive mechanism. Housed in the same seasoned wooden cabinet with sunmica finish. Guard ring around the line terminal and guard terminal eliminate surface-leakage errors. Externally accessible infinity adjuster provided. Conforms to IS: 2992-1987.

• Field insulation testing where mains supply is uncertain or unavailable
• Sustained PI and dielectric absorption testing (motor-driven mode)
• Remote substation and railway traction equipment commissioning
• HV transformer and cable insulation assessment

Specifications.

Drive

Mains motor (230 V, 50 Hz A.C.) plus collapsible hand-crank backup

Body

Seasoned wooden cabinet with sunmica finish, detachable lid, handle, lock

Scale Length

100 mm (approx.)

Accuracy

As per IS: 2992-1987

High Voltage Test

Min. 2 kV or (rated voltage + 1) kV A.C. (r.m.s.), 1 min

Insulation Resistance Test

Better than 50 MΩ at 500 V D.C.

Guard Terminal & Infinity Adjuster

Guard ring and guard terminal eliminate surface-leakage errors; externally accessible infinity adjuster provided

Dimensions (incl. top cover, approx.)

14 × 10 × 10 inch

Weight (incl. top cover)

12 kg (approx.) - heavier than plain CIE/777 (9 kg)

Response Time

3 seconds

Range Configuration

Multiple range options available - choose the option above

Warranty

12 months against manufacturing defects only