Multirange Motorised Insulation Tester

About.

The CIE/777/MR is a motorised multi-voltage insulation tester with a dual-scale (inner/outer) reading arrangement. Unlike the range-selector-switch approach used in the hand-driven CIE/444/MR and CIE/666/MR, the 777/MR uses two concentric scales on a single movement: the inner scale covers a standard resistance range and the outer scale covers an extended range, at each rated voltage. This lets the operator read either range without switching instruments. Five series (MR-A to MR-E) cover different combinations of rated voltage and inner/outer scale ranges. Retains full sustained-voltage capability (motor-driven) for PI and dielectric absorption testing. Physical specifications (weight, dimensions) vary by series - contact us to confirm for the specific MR variant required.

• Transformer and HV switchgear insulation testing requiring both standard and extended resistance range
• PI and dielectric absorption testing across multiple voltage classes
• Industrial and utility insulation maintenance programs

Specifications.

Drive

Motorised (mains, 230 V, 50 Hz)

Series Available

MR-A to MR-E

Display

Dual-scale inner/outer (MR-A, MR-B, MR-D) or single-scale (MR-C, MR-E)

Note on Specs

Varies by series - contact us to confirm

Warranty

12 months against manufacturing defects only