We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Red handheld tester with touch screen and wireless antenna

ETCR

ETCR 4500 Wireless PT Secondary Voltage-drop/Load Tester 2V~700V 0.001A - 20A electrician tool

SKU CH-42BK-QDYP7 MPN 4500

Wirelessly measures PT secondary voltage drop, load, current, voltage and phase from 2 V to 700 V and 0.001 A to 20 A with LORA synchronisation

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures secondary voltage drop from 2V to 700V for accurate PT assessment
  • Wireless LORA at 230MHz enables synchronous testing across substation locations
  • Single unit functions as three-phase voltammeter, load tester and unbalance degree tester
  • Current range 0.001A to 20A with phase measurement 0° to 360°
  • Power analysis covers active, reactive and apparent power up to 7000W/VAR/VA

Substation PT Secondary Testing

The ETCR 4500 is a wireless tester designed for synchronous measurement of secondary voltage drop, load, current, voltage, phase and other parameters on potential transformers in substations. It suits electrical engineers and maintenance crews who need portable three-phase analysis without fixed wiring. A single unit functions as a voltammeter, load tester and unbalance degree tester.

Wireless LORA Range and Frequency Limits

Communication relies on a wireless LORA link at 230MHz, which sets the practical range for synchronous dual-tester measurements across different substation positions. The instrument operates on power-system frequencies between 45Hz and 65Hz, so it cannot be used on DC networks or variable-frequency drives outside that band. Phase angle coverage spans the full 0° to 360° circle.

Measurement Headroom from Millivolts to Kilowatts

Voltage input accepts 2V to 700V while current measurement covers 0.001A up to 20A, giving wide dynamic range for both light-load and heavy-load PT circuits. Power readings extend to 7000W, 7000VAR and 7000VA for active, reactive and apparent quantities respectively. Beyond these limits the tester cannot resolve voltage drop or power parameters accurately.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $917.99
Pricier than about 92% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameETCR
Model name4500
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

Which measurement range should I pick for a substation PT that runs up to 700 V and 20 A?

This single unit covers 2 V to 700 V and 0.001 A to 20 A, so one tester handles the full secondary span without swapping ranges.

What does the 7000 W active-power figure mean when I hook the tester to a live PT secondary?

It shows the maximum real power the instrument can display — readings above 7000 W will exceed the scale.

How far can the 230 MHz LoRa link reach between two testers on opposite sides of a substation?

The wireless LoRa channel at 230 MHz synchronises phase, voltage and current data across the yard without cables.

More in Electrical Trade Tools & Kits

Similar items