Online gas-in-oil measurement sensor Hydrocal 1003 Offshore, a system with 3 outputs for measuring:
- H2 Hydrogen
- CO Carbon monoxide
- H2O Moisture
Online gas-in-oil measurement sensor Hydrocal 1003 Offshore, a system with 3 outputs for measuring:
Transformer Online Monitoring System with Gas-in-Oil and Moisture in Oil Measurement
The analysis of the gases dissolved in power transformer oil (DGA, DissolvedGas Analysis) is recognised as the most useful tool for detecting and diagnosing incipient faults in transformers.
In addition, water contamination deteriorates the performance of the oil as high moisture content increases the risk of corrosion and overheating, particularly when the water content reaches the oil's saturation point and free water is formed.
Besides regular gas chromatographic analysis and off-line moisture analysis of the isolation oil of power transformers, online monitoring systems are becoming more important worldwide.
By online monitoring of the key fault gases, Hydrogen (H2) and Carbon Monoxide (CO) and Moisture in Oil (H2O), an additional potential of cost reductions and safety improvements can be achieved.
The Hydrocal 1003 Offshore can be used as a complete monitoring system for the condition of the transformer. The main monitoring options are listed below:
RS 232 (Standard)
RS 485 (Standard)
GSM modem (Option)
Analog modem (Option)
Ethernet modem (Option)
DNP3 modem (Option)
Mounting of the HYDROCAL 1003 Offshore unit on a valve on the transformer tank.
Natural oil convection inside of the transformer is ensuring the exchange of the oil at the membrane.
The HYDROCAL 1003 Offshore unit is mounted on a T-fitting valve on the return flow of the cooling system.
The forced oil convection is ensuring the exchange of the oil at the membrane.
General Technical Data | |
Optional nominal voltages of auxiliary supply | 120 V -20% +15% AC 50/60 Hz |
Power consumption | Max. 200 VA |
Housing | Aluminium with painting C5M / stainless steel V4A |
Dimensions | W 224 x H 224 x D 307.5 mm |
Weight | approx.9 kg |
Operation temperature (ambient) | From -50 °C to +55 °C (below -10°C display function locked) |
Oil temperature (inside transformer) | From -20 °C to +90 °C |
Storage temperature (ambient) | From -20 °C to +65 °C |
Oil Pressure | up to 800 kPa (no negative pressure allowed) |
Connection to valve | G 1½" DIN ISO 228-1 1½” NPT ANSI B 1.20.1 |
Safety | CE certified |
Insulation protection | IEC 61010-1:2002 |
Degree of protection | IP-55 |
Analog outputs | ||
Type | Range | Default Concentration (Free Assignment) |
1 Current DC | 0/4 ... 20 mA DC | Hydrogen H2 |
1 Current DC | 0/4 ... 20 mA DC | Moisture H20 |
1 Current DC | 0/4 ... 20 mA DC | |
1 Current DC | 0/4 ... 20 mA DC | Carbon monoxide CO |
Digital Outputs | ||
Type | Control voltage | Max. Switching capacity (Free assignment) |
4 relay | 12 V DC | 220 V DC / V AC / 2A / 60 W |
8 optocoupler | 5 V DC | UCE: 24 V rated / 35 V max. UEC: 7 V max. ICE: 40 mA max. |
Analog inputs | |||
Type | Range | Accuracy | Comments |
4 Current DC 4 Voltage DC | 0/4 ... 20 mA DC + 20% 0 ... 10 V + 20% | ≤ 1.0 % | Configurable by jumpers (default configuration: Current) |
4 Current DC | 0/4 ... 20 mA | ≤ 0.5 % |
Communication |
RS 232 - Serial interface with external connector (Proprietary or MODBUS® RTU/ASCII protocol) |
RS 485 (proprietary or MODBUS® RTU/ASCII protocol) |
ETHERNET 10/100 Mbit/s modem (Option) Copper-wired / RJ45 or fibre-optical / SC duplex connector (Proprietary protocol) |
2G/3G modem with external adhesive antenna (Option) (proprietary protocol) |
Analog modem (Option) (Proprietary protocol) |
DNP3 serial modem (Option) with RS 485 connection (DNP3 protocol) |
IEC 61850 modem for SCADA connection (Option) |
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