Description
With over 40 years of proven service in over 33,000 utility transformers around the globe, the 1250-LTC does so much more than just monitor tap position. It is a vital tool that utilities use to predict transformer maintenance and prevent the failure of their LTC’s.
Key Advantages
- BALANCE LOADS - Ensure transformer loads are balanced.
- REGULATE VOLTAGE - Regulate line voltage by adjusting feeder voltage.
- REDUCE COSTS - Reduce power costs by providing minimum line voltage to the customer.
- HIGHLIGHTS & TECHNOLOGY -
- Receives signal from a resistive drumswitch or “Slidewire” transmitter, 60 ohms min.
- Provides a more reliable reading of the transmitter through software filtering and higher 24V signal strength
- Optional RS-232 port
- Optional High/Low limit relays function as programmable drag-hand contacts
- Outputs interface to PLCs, SCADA RTUs and substation computers
MODEL COMPARISON
| LTC MONITOR | 1250B | 1250-LTC | 1511-LTC |
| Applications | Transformer LTC Position, Hydro Dam Gate Position, Dam Head/Tail Water Level, Industrial Rotary Power | Transformer LTC Position, LTC Position Data Collection | Transformer LTC Position |
| Transducer Type | Synchro (1292) | Synchro (1292) | Resistance Switch (Slidewire) |
| Input Signal | 0-90 VAC, 50/60 Hz | 0-90 VAC, 50/60 Hz | 0-24 VDC |
SPECS All Models
| Resolution (1250B & 1250-LTC) | ± 0.001% of full scale or 6 arc minutes |
| Accuracy | +/-0.02% of full scale, maximum (0.01% typical) |
| Temperature Drift | +/-0.01% per °C |
| Operating Temperature | 0 ° to 55 °C |
| Humidity | 10% - 90% non condensing |
| Weight | 24 ounces |
| Voltage | 117 +/- 10% |
| Frequency | 47 - 63 Hz |
| Load | 8 Watts, maximum |
| Display Type | 5-digit LED |
| Digit Height | 0.56 inch (14.2 mm) |
| Viewing Distance | 23 feet |
| Decimal Point (1250B) | Field programmable |
| Optional Analog Outputs | +/- 1 mA, 0-1 mA, 0-2 mA, 4-20 mA (requires 15 to 24 VDC external loop power) |
| Compliance | 10 Volts (0-1 mA, ± 1mA, 0-2 mA) 500 Ohms (4-20 mA) 5 mA (0-10 VDC, ± 10 VDC) 1511-LTC |
| Resolution | 12 bits (± 0.025% of full scale) |
| Optional Hi/Lo Relay Contact Rating | 3A @ 125/250 VAC (resistive), 30 VDC |
| Communication Options | RS-232 (ASCII) RS-485 Full Duplex (MODBUS) |
POWER SUPPLY
The INCON® 15 Volt DC regulated Power Supply is used with INCON® Programmable Load Tap Changer (LTC) Position Monitors that are ordered with the 4-20 milliamp analog output option.
| Model | Description |
|---|---|
| 1945 | 15 VDC Loop Power Supply (For 4-20 mA Analog Output) |
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This product is a Class 1 power supply and requires the chassis to be connected to earth ground at end application. Use 700 °C iron for soldering input connections. Tolerance for 230 VAC operations is +15% to -10%.
Highlights
- VDE transformer construction (full rated to 50 °C)
- + 0.05% regulation - foldback / current limit
- T.C. burned-in to MIL - 883 Lev. B
- UL recognized / CSA certified
- Chassis notched for AC input
- Over voltage protection on 15V output
- 100/120/220/230-240 VAC power
- Industry standard frame size
- This product is a Class 1 power supply and requires the chassis to be connected to earth ground at end application.
- The five-wire input to the power supply provides four voltage ranges: 100/120/220/230-240. Extended low line tolerance provides additional drop out margin in areas where line voltages are marginal. Inputs must be fused.
- Convection cooling is adequate where nonrestricted airflow is available. When operating in a confined area, moving air or conduction cooling is recommended.
- The power supply has inherently low conducted and radiated noise levels for most system applications that meet the requirements of FCC Docket 20780 for Class A equipment without additional noise filtering.
Safety
The 1945 power supply is designed to meet or exceed requirements of the following specifications: IEC 380, IEC 435, VDE 0730 Part 2, VDE 0804, ECMA-57, CEE 10 Part 2P, UL 1012, CSA 22.2 No. 143, CSA 22.2 No. 154. Specifically, field terminal to terminal spacing is 5.25 mm with 9.0 mm creepage to other metal. Leakage current is less than 5.0 mA and dielectric withstanding voltages are 3750 VAC input to chassis. 3750 VAC input to output and 300 VDC output to chassis.
Specifications
| AC Input | 100 / 120 / 220 / 230-240 VAC, ±10%, 47-63Hz (derate output current 10% for 50 Hz operation). Fuse at: 0.5 / 0.25 amps for 100 -120 / 220 - 240 VAC. |
| Fuse at | 0.5 / 0.25 amps for 100 -120 / 220 - 240 VAC |
| DC Output | 12 - 15 V (± 5%) Adjustable |
| Line Regulation | ± 0.05% for a 10% line change |
| Load Regulation | ± 0.05% for a 50% load change |
| Output Ripple | 5.0 mV PK-PK maximum |
| Transient Response | ≤ 50μs for a 50 to 100 % load change |
| Short Circuit and Overload Protection | Automatic current limit / foldback |
| Over Voltage Protection | Not Available |
| Remote Sensing | Separately connect S+ and S- terminals to the load to regulate the voltage at the load |
| Stability | ± 0.3% for 24 hour period after 1 hour warm-up |
| Temperature Rating | 0 °C to 50 °C full-rated derated linearly to 40% at 70 °C |
| Temperature Coefficient | ± 0.03%/°C maximum |
| Efficiency | 55% |
| Vibration | Per ML-STD-8100 method 514.3 category 1 procedure I |
| Shock | Per ML-STD-8100 method 516.3 procedure III |
| Weight | 2 lbs (1 kg) |
| Shipping Weight | 3 lbs (1.5 kg) |
STEP DOWN TRANSFORMER
| Model | Description |
|---|---|
| 1924-20VA | Step down transformer |