Online Dissolved Gas Monitors(Calisto) - Leadfar Technologies Co., Ltd.

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Online Dissolved Gas Monitors

Product ID: Calisto

Early detection of transformer incipient faults using continuous monitoring of dissolved hydrogen in insulating fluids.
Monitoring dissolved carbon monoxide as a key indicator of cellulose degradation (Calisto 2 only).
Continuous moisture monitoring.

Specifications:

Performance

Dissolved gases (H2 and CO) in oil measurement
Measurement technology	Proprietary Morgan Schaffer Gen2 cell
Gas extraction technology	Oil immersed PFTE tubing
Detection range	H2: 2 - 50,000 ppm CO: 25 - 100,000 ppm
Accuracy (ref: MS oil standards)	H2: Greater of ±5 ppm or ±5% CO: Greater of ±25 ppm or ±15%
Repeatability	H2: Greater of ±3 ppm or ±3% CO: Greater of ±25 ppm or ±10%
Resolution	H2: 1 ppm CO: 5 ppm
Step response (typical conditions)	H2: 50% in 60 min. CO: 90% in 6 hours
Interference	H2: < 0.3% of other gases CO: < 5% from C2H2, < 3% from CH4, C2H2, C2H6
Moisture (H2O) in oil measurement
Measurement technology	Oil immersed RS sensor
Detection range	2 ppm - saturation, 2 - 100% RS
Accuracy (ref: MS oil standards for ppm and RS)	± 3 ppm or ± 3% RS
Repeatability	± 2 ppm or ± 2% RS
Resolution	1 ppm, 1% RS
Step response (typical conditions)	95% in 20 min.

Operation

Operating temperature range (standard)	-40 to 55°C
Storage temperature range	-30 to 75°C
Operating oil temperature range	-40 to 120°C
Oil pressure operation range	Full vacuum to 40 psi
Operating humidity range	0 - 100% RH
Storage humidity range	5 – 95% RH, non-condensing
Altitude range	Up to 4,000 m

Construction

Width x Height x Depth	381x 483 x 325 mm (15 x 19 x 12.8 in)
Weight	22.7 kg / 50 lbs
Enclosure	S.S. 304 gauge 16, lockable
Oil circulation	Anti-cavitation reciprocating pump, 10-60 ml/min
Oil flow monitoring	Proprietary Morgan Schaffer system
Oil lines (standard)	3/8” OD copper with brass compression fittings
Enclosure temperature conditioning	Thermoelectric feedback
Oil temperature conditioning	Passive heat exchanger Thermoelectric feedback
Cooling	Forced air convection
Safety protection	Thermal cut-off fuse, rated at 77°C Over-current protection fuse
Oil sampling	External quick-connect port with sampling accessories

Features:

1. Separate H2 and CO measurements (100%)

2. Oil circulation (the trend in monitoring)

3. At least 15 years life duration, no parts to be replaced

4. Auto calibration every three hours

5. Oil sampling port

6. Configurable alarm relays, trend alarms, oil flow alarm, 4-20mA,

7. Resistant to vacuum

8. No maintenance, designed for tropical areas

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