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CIE/777
Motorised Insulation Tester
Mains-motor-driven insulation tester for sustained PI and dielectric absorption testing. Available in single-range configurations at 500, 1000, 2500, 5000 and 10,000 V.
Insulation Testers · Motor-Operated
CIE/777 HM Motor-cum-Hand Driven Insulation Tester
Motor-cum-hand driven insulation tester - mains motor for PI testing, hand-crank backup for field use. Available in single-range configurations at 500, 1000, 2500, 5000 and 10,000 V.
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Technical Catalogue (PDF)
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Catalogue for your configuration
Select rated voltage and insulation range.
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 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.
Technical Specifications
| Specification | Value |
|---|---|
| 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 - specify at order |
| Warranty | 12 months against manufacturing defects only |
Custom ranges and configurations can also be built against specific requirements.
Additional Options
- Rexine carrying case - at extra cost
- 15-minute timer facility - at extra cost
- Additional/special-grade H.V. testing leads, 2m - at extra cost
- Dual voltage & dual insulation range option - at extra cost
- Single voltage, dual insulation range option - at extra cost
- Any other range - on request
What's Included
- Mains cord, 2 metres
- 1 pair of H.V. testing leads
Key Applications
- 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
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.
Related Products
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CIE/444
Insulation Tester - Metal Body, Hand-Driven
Hand-cranked analog insulation tester in anti-magnetic aluminium body - no batteries required. Available in single-range configurations at 100, 250, 500, 1000, 2500 and 5000 V.
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CIE/666
Insulation Tester - Wooden Body, Hand-Driven
Hand-cranked analog insulation tester in seasoned wooden body - available in single-range configurations at 100, 250, 500, 1000, 2500, 5000 and 10,000 V. More rated voltages than the metal-body CIE/444.
Interested in the CIE/777 HM? Get a quote by email.
Email us with your model, quantity, and specification - we respond within one business day.