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CIE/777 HM/MR
Multirange Motor-cum-Hand Driven Insulation Tester
Dual-scale motor-cum-hand driven insulation tester - inner/outer scale, mains motor plus hand-crank backup. Series MR-A to MR-E.
Insulation Testers · Multirange Motorised
CIE/777/MR Multirange Motorised Insulation Tester
Dual-scale motorised insulation tester - inner and outer scale readings cover two ranges per voltage. Series MR-A to MR-E.
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Technical Catalogue (PDF)
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Download selected (PDF)Need a range not listed? Use Request a Quote below - custom ranges can be built.
CIE® Guarantee
- CIE® Registered Trade Mark
- Calibrated Before Despatch
- 12-Month Warranty
- Made in India
- Custom Ranges Available
About This Instrument
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.
Technical Specifications
| Specification | Value |
|---|---|
| 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 |
Available Series - Voltage, Inner Scale & Outer Scale
| Series | Voltage | Inner Scale | Outer Scale |
|---|---|---|---|
| MR-A | 5000 V | 0–5000 MΩ | 50–100000 MΩ |
| 2500 V | 0–2500 MΩ | 25–50000 MΩ | |
| 1000 V | 0–1000 MΩ | 10–20000 MΩ | |
| MR-B | 5000 V | 0–2000 MΩ | 10–10000 MΩ |
| 2500 V | 0–1000 MΩ | 5–5000 MΩ | |
| 1000 V | 0–500 MΩ | 2–2000 MΩ | |
| MR-C | 5000 V | 100–100000 MΩ | - |
| 2500 V | 50–50000 MΩ | - | |
| MR-D | 5000 V | 0–5000 MΩ | 50–100000 MΩ |
| 2500 V | 0–2500 MΩ | 25–50000 MΩ | |
| MR-E | 5000 V | 50–50000 MΩ | - |
| 2500 V | 25–25000 MΩ | - | |
| 1000 V | 10–10000 MΩ | - |
Dual-scale analogue display - inner and outer resistance scales on same movement.
Any configuration apart from the standard MR series shown above can be built to order.
Additional Options
- Carrying case - at extra cost
- Testing leads, 1m - at extra cost
- H.V. testing leads, 2m - general / special - at extra cost
- Timer - at extra cost
- Any other range - on request
Key Applications
- 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
12-Month Warranty · Direct After-Sales Support
Every CIE® instrument carries a 12-month warranty against manufacturing defects only. After-sales support is handled directly by CIE - not a distributor network. Non-standard ranges or custom specifications can be manufactured to your requirement.
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Interested in the CIE/777/MR? Get a quote by email.
Email us with your model, quantity, and specification - we respond within one business day.