Motorised Insulation Tester

About.

The CIE/777 is a universal, multi-purpose insulation tester for checking insulation and conductance under simulated operating conditions in high-tension electrical and electronic applications. Driven by a mains motor (230 V AC, 50 Hz), the CIE/777 applies test voltage continuously for as long as needed - enabling genuine polarization index (PI) and dielectric absorption testing that hand-cranked instruments cannot sustain. PI is calculated as resistance after 10 minutes ÷ resistance after 1 minute; better results are obtained with longer periods. Housed in a seasoned wooden cabinet with sunmica finish (detachable lid, handle, lock). Guard ring around the line terminal and guard terminal eliminate surface-leakage errors. Externally accessible infinity adjuster provided. Conforms to IS: 2992-1987.

• Sustained insulation and polarization index (PI) testing on large motors and generators
• Power transformer insulation assessment including dielectric absorption ratio
• HV cable and switchgear insulation testing
• Substation commissioning by EPC contractors

Specifications.

Drive

Mains motor, 230 V, 50 Hz A.C.

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)

9 kg (approx.)

Response Time

3 seconds

Range Configuration

Multiple range options available - choose the option above

Warranty

12 months against manufacturing defects only