Sencore PR57 AC Powerite Variable Isolation Transformer / Safety Analyzer

The Sencore PR57 AC Powerite is a four-function safety analyzer that combines isolation transformer, variable AC voltage source, AC line monitor, and leakage tester into a single instrument. It isolates equipment under test from the AC power line to eliminate shock hazards during servicing while protecting both user and device. The continuously variable isolated output (0–140 VAC) enables testing across multiple line conditions—high voltage, low voltage, and intermittent scenarios—to assess circuit performance and identify transient faults. Real-time metering displays AC line voltage, isolated output voltage, current draw, and power consumption of the device under test. The integrated safety leakage test function verifies that exposed metal parts present no shock hazard, meeting manufacturer safety compliance requirements.

– Technical Specifications

Isolated Output
• Voltage: 0–140 VAC, continuously variable
• Current: 0–3 A continuous; 3–4 A intermittent (5 min on / 5 min off)
• Wattage: 0–175 W and 0–470 W ranges; calculated as volts × amps product
• Power Accuracy: ±3% full scale at 117 VAC output
• Output Loading: <12 V drop at 3 A load, 120 VAC

AC Line Leakage Test
• Range: 0–800 µA, ±3% full scale (calibrated at 500 µA)
• Measurement Method: Referenced to either side of isolated output jack via switch selection
• Protection: 150 mA RMS, 150 V max
• Calibration Check: 100 µA, ±3% ±2 counts at 120 VAC isolated output
• Note: Requires only Safety Leakage Probe connection; no other device connections necessary

AC Line Monitor
• Line Voltage: 0–150 VAC, ±3% full scale (calibrated at 117 VAC)
• Output Voltage: 0–150 VAC, ±3% full scale (calibrated at 117 VAC)
• Output Current: 0–1.5 A AC and 0–4 A AC ranges, ±3% full scale accuracy

Protection
• AC Input: 4 A magnetic circuit breaker integrated into power switch

– Key Features

• Voltage continuously adjustable from zero to 140 VAC for controlled test scenarios
• Dual wattage ranges accommodate low-power and medium-power device testing
• Leakage measurement accuracy of ±3% full scale ensures compliance verification
• Integrated dual-range ammeter monitors current across two operating bands

– Typical Applications

• Equipment servicing with AC isolation safety requirements
• Leakage current verification and safety compliance testing
• Voltage stress testing under simulated high and low line conditions
• Power consumption profiling and current draw analysis