CEM
CEM DT-5505 insulation tester 125V 250V 500V 1000V 4000MΩ dual display backlight
Tests insulation at 125, 250, 500 and 1000V up to 4000MΩ with dual backlit display and auto-discharge protection
- TypeTest Equipment
- Color/FinishRed
- Item Count1 pack
- Selling UnitBox
- Parts3 Years
- Labor1 Year
- Test up to 4000 MΩ with 1 kΩ resolution
- Four test voltages: 125 V, 250 V, 500 V, 1000 V
- 1 mA test current at rated voltage
- Auto-discharge of capacitive voltage after test
- Live-circuit detection blocks test above 30 V
Insulation tester with four voltages
The CEM DT-5505 is an insulation tester built for electricians and maintenance engineers who need to verify dielectric strength on cables, motors and switchgear. It offers selectable test voltages of 125V, 250V, 500V and 1000V with a measurement range up to 4000MΩ. A large dual display with backlight shows readings clearly in dim environments. The instrument is supplied new in a single box.
Sustained-load behaviour with auto-discharge
During prolonged testing the unit maintains a 1mA test current at the rated voltage to charge capacitive loads without sagging. Auto-discharge releases stored capacitive voltage after each measurement, protecting the operator and the device under test. Live-circuit detection blocks the insulation test if more than 30V is present on the circuit, preventing accidental energised measurements. Min/Max recording and Data Hold capture the highest and lowest values across extended test sessions.
Installation notes and common pitfalls
The tester ships without batteries because air-freight regulations forbid them in the package; users must source suitable cells locally before first use. No English manual is included in the box, so operators should request documentation from customer service after purchase. Ensure test leads are rated for the selected voltage and that the circuit is fully de-energised before connecting, as the >30V lockout will inhibit the test otherwise.
Highlights
- Test up to 4000 MΩ with 1 kΩ resolution
- Four test voltages: 125 V, 250 V, 500 V, 1000 V
- 1 mA test current at rated voltage
- Auto-discharge of capacitive voltage after test
- Live-circuit detection blocks test above 30 V
Specifications
| Brand | CEM |
|---|---|
| Model | DT-5505 |
| Type | Test Equipment |
| Color/Finish | Red |
| Item Count | 1 pack |
| Selling Unit | Box |
| Parts | 3 Years |
| Labor | 1 Year |
Questions about this item
How hot or noisy does the DT-5505 get during continuous insulation testing?
The DT-5505 has no fan; it runs silently and stays cool during all-day use because it only draws current when the test button is pressed.
What must I already own to power the DT-5505 and start testing?
You need to supply your own batteries; the package ships without them due to air-freight restrictions.
Will the DT-5505 safely test circuits that still have older wiring energised at low voltage?
Live-circuit detection blocks the insulation test if more than 30 V is present, and auto-discharge removes stored capacitive voltage after each test.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
