Kewtech KT63DL - User Manual

kewtechcorp.com
KT63DL
Multifunction Installation Tester
Operating Instructions

Summary

Safety Information and Symbols

Key Features

Large Display

Features a large auto-backlit LCD for clear results in all lighting conditions.

Auto Shut Down

Powers down the unit automatically after three minutes of inactivity to preserve battery life.

Battery Check

Position on selector switch checks battery status; low power indicated by red LED.

Extended Battery Life

Powered by four AA batteries with low power consumption for extended operational life.

Hands-Free Mode

Allows tests to start automatically upon probe connection, freeing user's hands.

Socket Wiring Check

Automatically checks polarity upon live supply connection, inhibiting unsafe tests.

Special Polarity Test Function

Audible Tones

Danger Tone

A rising siren indicates a potentially dangerous situation, accompanied by LED flashing.

Warning Tone

A continuous 2-tone alarm signals unsuitable supply or incorrect polarity.

Test In Progress Tone

A steady beeping sound indicates a measurement is in progress or continuous testing.

Test Completed Tone

A single beep signals that a measurement is complete and the result is displayed.

Alert Tone

A short 2-tone alarm sounds when a test result indicates a likely failure.

Switches and LCD Overview

Primary and Secondary Displays

Primary display shows test results; secondary display shows supporting information.

Test Lead Inputs

Continuity and Insulation Test Connections

Interlock left exposes terminals for Continuity/Insulation tests using specific plugs.

RCD and Loop Test Connections

Interlock right exposes terminals for RCD/Loop tests using different leads.

Continuity Test Function

Continuity Test Procedure

Step-by-step guide for fitting leads, selecting function, and performing continuity tests.

Lead Nulling

Feature to measure and deduct test lead resistance for accurate continuity readings.

Hands-Free Continuity Testing

Enables continuous continuity testing without holding buttons, activated by HANDS FREE.

Insulation Test Function

Insulation Test Procedure

Steps for fitting leads, selecting voltage, and performing insulation resistance tests.

Insulation Test Caution

Warns against touching energized probe tips/clips during insulation testing.

Hands-Free Insulation Testing

Enables continuous insulation testing without holding buttons, activated by HANDS FREE.

Loop Test Functions

High Current Loop Mode

Fast 2-wire test for true impedance, PSC, and PFC, suitable for distribution boards.

No Trip Loop Mode

3-wire test for Zs on RCD-protected circuits without tripping the RCD.

PFC;PSC Calculation

Displays supply voltage and calculates Prospective Fault Current (PFC/PSC).

Test Lead Configuration for Loop Tests

Details required lead options for accurate loop test results.

Lead Configuration for No-Trip Testing

Specifies using KAMP12 or ACC063 for No-Trip mode with 3-wire connection.

Lead Configuration for High Current 2-Wire Testing

Details using ACC063 in 2-wire mode for high current loop tests.

No Trip Loop Test (Zs) Procedure

Step-by-step guide for performing the No Trip Loop test to measure Zs.

High Current Test (Ze) Procedure

Steps for performing high current loop test to measure Ze using specific lead configurations.

Hands Free Loop Testing

Enables hands-free operation for both No Trip and High Current loop tests.

Mains Supply Wiring and Voltage Test

RCD Test Function

RCD Test Requirements

Details test criteria for RCDs: x1/2, x1, and x5 fault currents at 0°/180°.

Automatic RCD Test

Allows automatic execution of all required RCD tests with a single button press.

RCD Test Pass;Fail Results

Indicates whether the RCD has passed or failed the BS7671 test requirements.

Ramp Test Feature

Diagnostic feature gradually increasing fault current to identify RCD trip levels.

Sinusoidal Polarity Test (0°;180°)

Tests RCD reaction times at 0° and 180° half cycles for accurate response.

RCD Test Procedure

Steps for selecting RCD type/rating and connecting the tester for testing.

User Selected RCD Test

Allows manual selection of test parameters like current multiplier and phase polarity.

30 mA Automatic RCD Test

Automates all 6 required tests for 30mA RCDs with one button press.

Ramp Test Operation

Details using ramp test to pinpoint leakage levels and diagnose nuisance tripping.

Specifications and Tolerances

Continuity Test Accuracy

Specifications and tolerances for continuity test measurements.

Insulation Test Accuracy

Specifications and tolerances for insulation resistance test measurements.

Insulation Output Voltage

Details output voltage levels and tolerances for insulation tests.

Loop Test Range Accuracy

Specifications and tolerances for various loop test modes.

RCD Test Range Accuracy

Specifications and tolerances for RCD test current and trip time accuracy.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The Kewtech KT63DL is a multifunction installation tester designed for comprehensive electrical circuit analysis. It combines several critical testing functions into a single, portable device, making it suitable for both live and dead circuit testing.

Function Description

The KT63DL offers a range of testing capabilities:

• Continuity Test Function: Measures the resistance of a circuit, including a lead nulling feature to automatically deduct test lead resistance for accurate readings. It can operate in a Hands-Free mode for continuous testing.
• Insulation Test Function: Measures insulation resistance at various test voltages (250V, 500V, 1000V). It includes a Hands-Free mode for continuous measurements and automatically discharges circuit capacitance after testing.
• Loop Test Functions: Features two modes:
  • High Current Mode: A 2-wire test for Ze testing at distribution boards or upstream of RCD protection, measuring true impedance (including reactance) to establish PSC (prospective short circuit current) and PFC (prospective fault current).
  • No Trip Mode (NTL): A 3-wire test for Zs testing on RCD-protected circuits, designed to avoid tripping the RCD. It also checks for correct Live, Neutral, and Earth connections before the loop test. In both loop modes, the device displays supply voltage and can show PFC/PSC at the touch of a button.
• RCD Test Function: Tests standard and selective type AC and type A RCDs. It performs various tests including x½ (no nuisance tripping), x1 (maximum disconnection time), and x5 (for 30mA RCDs, 40ms disconnection time). Tests are conducted at both 0° and 180° sinusoidal polarities. An "Automatic test" feature simplifies testing for 30mA AC/A RCDs by performing all six required tests with a single button press. A "Ramp test" feature gradually increases fault current to identify the RCD trip level, useful for diagnosing nuisance tripping.
• Special Polarity Test Function: Detects rare but dangerous reverse wiring conditions where Line (Phase) is connected to earth/neutral and vice versa, which conventional testers might miss.
• Socket Wiring Check: Automatically checks polarity upon connection to a live supply, inhibiting testing and sounding an alarm if wiring is incorrect.

Important Technical Specifications

• Continuity Test Range: 0.00 Ω - 19.99 KΩ (Operating Range: 0.1 Ω - 9.99 KΩ). Test current >200mA, Open Circuit Voltage <7V.
• Insulation Test Range: 0.00 MΩ - 1999 MΩ (Operating Range: 0.1 MΩ - 1990 MΩ). Test current = 1mA.
• Insulation Output Voltage Tolerance: -0% +20% at specified loads (250V/250KΩ, 500V/500KΩ, 1000V/1MΩ).
• Loop Test Range (No Trip & High Current): 0.01 Ω - 500 Ω (Operating Range: 1.04 Ω - 500 Ω) at 230V 50Hz.
• RCD Trip Time Range: 5 ms - 1999 ms (Operating Range: 38 ms - 1999 ms).
• PFC/PSC Accuracy: Derived from measured loop impedance and voltage specifications. Voltage measurement: +/- 3% 50/60Hz and 90 – 250V.
• RCD Test Current Accuracy: -0% to -10% for ½ I, +0% to +10% for I and 5I.
• RCD Trip Time Accuracy: ±(1% + 1ms) up to 1 second, ±(1% +10ms) over 1 second.
• Safety Ratings: Continuity and Insulation functions rated at 500V Category III. Loop and RCD functions rated at 300V Category IV. Protected against overvoltage to 550V.
• Fuse Protection: F 500mA fast blow ceramic 500V.
• Power Supply: Four AA / LR6 Alkaline batteries.
• Compliance: EN61010, EN61557.

Usage Features

• Large Auto-Backlit LCD: Provides clear test results, even in poorly lit areas.
• Auto Shut Down: Powers down after three minutes of inactivity to preserve battery life.
• Battery Check: A dedicated function on the rotary selector switch.
• Extended Battery Life: Low power consumption for prolonged use.
• Easy to Locate Test Lead Inputs: Positioned on top of the case for vertical or flat use.
• Hands-Free Mode: Available for Continuity, Insulation, and Loop tests, allowing automatic test initiation upon probe connection.
• Audible Tones: Provides intuitive feedback during testing, including danger alarms, warnings, in-progress indicators, completion beeps, and alerts for potential failures.
• RCD Recall Button: Allows cycling through results after an automatic RCD test.
• Test Lead Interlock Cover: Ensures only one set of leads can be fitted at a time, enhancing safety.
• Supplied Accessories: Neck strap for portability, ACC063 3-pole distribution board test lead set (with prod tips or crocodile clips), KAMP12 13A mains lead.

Maintenance Features

• Fuse Replacement: Fuse located inside the battery compartment, accessible by removing two screws.
• Cleaning: Wipe with a damp cloth and mild soap solution; avoid water ingress into terminals.
• Battery Installation: Observe correct polarity, do not mix old and new batteries. Dispose of used batteries according to local regulations.
• Calibration: Recommended to return the tester to Express Cal for repair and calibration.

Kewtech KT63DL Specifications