Deif SIM-Q MKII - User Manual

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Table of contents

WARNINGS AND LEGAL INFORMATION ............... ERROR! BOOKMARK NOT DEFINED.

3.5 LEGAL INFORMATION AND RESPONSIBILITY ........................ ERROR! BOOKMARK NOT DEFINED.

3.6 ELECTROSTATIC DISCHARGE AWARENESS ........................ ERROR! BOOKMARK NOT DEFINED.

3.7 SAFETY ISSUES ............................................................... ERROR! BOOKMARK NOT DEFINED.

3.8 DISCLAIMER .................................................................... ERROR! BOOKMARK NOT DEFINED.

3.9 DEFINITIONS ................................................................... ERROR! BOOKMARK NOT DEFINED.

2. APPLICATION – GAS ENGINE AND CHP CONTROL ............. ERROR! BOOKMARK NOT

DEFINED.

2.1 FUNCTIONALITIES ............................................................ ERROR! BOOKMARK NOT DEFINED.

2.2 SCOPE OF SUPPLY .......................................................... ERROR! BOOKMARK NOT DEFINED.

2.3 NEEDED INFORMATION FOR QUOTATIONS .......................... ERROR! BOOKMARK NOT DEFINED.

3. SOLUTION DESCRIPTION, ENGINE ....................... ERROR! BOOKMARK NOT DEFINED.

3.1 DM 400 GAS – MAIN CONTROLLER ................................... ERROR! BOOKMARK NOT DEFINED.

3.2 AIR/FUEL MIXERS ............................................................. ERROR! BOOKMARK NOT DEFINED.

3.3 THROTTLE VALVE AND ACTUATOR ..................................... ERROR! BOOKMARK NOT DEFINED.

3.4 DIGITAL IGNITION CONTROL SYSTEM ................................. ERROR! BOOKMARK NOT DEFINED.

3.5 ANTI KNOCKING SYSTEM .................................................. ERROR! BOOKMARK NOT DEFINED.

4. SOLUTION DESCRIPTION, RETROFITS ................ ERROR! BOOKMARK NOT DEFINED.

5. SOLUTION DESCRIPTION, CHP ............................. ERROR! BOOKMARK NOT DEFINED.

5.1 AVAILABLE COMBINED CONTROLS ..................................... ERROR! BOOKMARK NOT DEFINED.

5.2 USER INTERFACE ............................................................ ERROR! BOOKMARK NOT DEFINED.

APPLICATION NOTES

Document no.: 4189330024A

• 3 functions: Normal, Fast and Test

• Easy adjustment and verification

• 2000 µF leakage capacitance

• Working voltage up to 690 V AC

and up to 1000 V DC

• IEC 61557-8

• Class approval

Selectable Insulation Monitor, SIM-Q MKII

INSTALLATION/OPERATION INSTRUCTIONS

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Summary

General information

Warnings, legal information and safety

Covers critical warnings, legal disclaimers, and essential safety protocols for handling the unit.

About the installation instructions

Details the general purpose, intended users, and structure of the installation instructions document.

Description

General description of SIM-Q MKII

Provides an overview of the SIM-Q MKII's function in monitoring IT power systems and its connection principles.

Installation

Connection

Explains how to connect the SIM-Q MKII, including options for test functions and power supply sources.

Dimensions

Presents the physical dimensions and outline drawings of the SIM-Q MKII unit for installation planning.

Changing the default settings

Details how to reconfigure the SIM-Q MKII using jumpers for various functions and settings.

Configuration of the measuring range

Describes how to select and change the measuring range for the SIM-Q MKII, including scale adjustments.

Adjustment of the set point

Explains how to adjust the warning set point on the rear of the housing and its behavior during power-up.

Fuse

Specifies the recommended fuse size for the auxiliary supply of the SIM-Q MKII.

WARNING - Megger test during commissioning

Warns about disconnecting the SIM-Q MKII during high-voltage Megger tests to prevent damage.

Operation

LED indicators

Details the function and meaning of the three LED indicators (Power, Status, Warning) on the SIM-Q MKII.

Normal mode

Explains the LED behavior and meter indications during normal monitoring mode, including start-up sequences.

Fast mode

Describes the LED indications and meter behavior when the SIM-Q MKII operates in fast mode for measurements.

Test mode

Details the LED status and meter display when the SIM-Q MKII is in test mode, indicating relay activation.

Response time graphs

Presents graphs illustrating the response time of the SIM-Q MKII based on capacitance and resistance values.

Technical specifications

Refers to the data sheet for detailed technical specifications of the SIM-Q MKII, including document number.

Determination of capacity within an application

Leakage capacitance in a connected network

Explains how to measure leakage capacitance in a connected network using voltmeter and ammeter.

Leakage capacitance in a disconnected network

Details the method for measuring leakage capacitance in a disconnected network using a mA meter and voltmeter.

Leakage capacitance using the SIM-Q MKII fault finding function

Describes how to use the SIM-Q MKII's fault finding function to estimate leakage capacitance via time measurement.

The DEIF SIM-Q MKII is a selectable insulation monitor designed for insulation monitoring on single-phase or 3-phase IT power systems, with or without a neutral connection. A key characteristic of IT power systems is that no live conductor is directly connected to earth. The SIM-Q MKII connects to the power system by connecting terminal 'P' to one of the phases (or the neutral), and the 'FE' input to the safety cable. For comprehensive insulation failure monitoring, all accessible conductive building structures must be connected to the 'FE' (functional earth) cable.

Function Description:

The SIM-Q MKII offers three primary functions: Normal, Fast, and Test mode, selectable via a switch on the front of the unit.

Normal Mode: After a 15-second fast measuring mode upon power-up, the unit automatically switches to normal monitoring. This mode continuously monitors insulation resistance.
Fast Mode (Fault Finding): This mode provides a quicker response time (1 second) for fault detection. If the set point is exceeded, the relay output will activate.
Test Mode: Moving the switch to "Test" initiates an internal function test. During this test, the scale reads 0 Ω, and the relay output is activated. This mode also displays the actual set point on the meter for the first 10 seconds after power-up.

The device is equipped with three LED indicators: two green (Power, Status) and one yellow (Warning). These LEDs provide visual feedback on the unit's status, measurement validity, and alarm conditions. For instance, a flashing Power LED indicates a power-up sequence, a solid Status LED signifies a valid measurement, and a solid Warning LED indicates an insulation error where the measured resistance is below the set point and the relay is activated. Different flashing patterns on the Status LED can also indicate resistance drops, jumps, or measurement failures.

Important Technical Specifications:

Leakage Capacitance: The SIM-Q MKII supports up to 2000 µF leakage capacitance. This setting is configurable via jumpers (DIP#2) to either 500 µF or 2000 µF, which also affects the measuring time.
Working Voltage: The unit is designed for working voltages up to 690 V AC and up to 1000 V DC.
Measuring Range: Configurable for either 0 to 1 MΩ (with 22 kΩ at scale centre) or 0 to 10 MΩ (with 220 kΩ at scale centre). This is set via jumpers (DIP#3) and requires a corresponding scale change.
Response Time: The response time is inversely proportional to the system's capacity and resistance. While the unit performs outside the IEC 61557-8 30-minute response time limit, users should be aware of the resulting response time when selecting a set point (Ran) in systems with 2000 µF settings.
Auxiliary Supply: Available in AC (80-152 V AC, 176-288 V AC, 320-576 V AC) and DC (18-30 V DC) versions. Recommended fuse size for auxiliary supply is max 2 A.
Relay Output: Configurable as normally de-energised (ND) or normally energised (NE) via jumpers (DIP#4).
Compliance: IEC 61557-8 compliant.
Class Approval: The device has class approval.

Usage Features:

Easy Adjustment and Verification: The warning set point is adjusted on the rear of the housing using a screwdriver. The actual set point is displayed on the meter during test mode and for the first 10 seconds after power-up.
Configuration: The unit's default settings can be reconfigured using four jumpers located on the PCB behind the rear cover. These jumpers allow selection of standard/custom settings, maximum leakage capacitance, measuring range, and relay output function.
Scale Exchange: The measuring range scale can be exchanged by interrupting the signal/supply, pushing the scale cover, removing the old scale, inserting the new one, and pressing the cover back into place.
Leakage Capacitance Determination: The manual provides methods for measuring leakage capacitance in both connected and disconnected networks using external instruments (voltmeter, ammeter, AC source). Additionally, the SIM-Q MKII's fault-finding function can be used to estimate leakage capacitance (C = t/0.3) when no insulation error is present.
Frequency Converter Compatibility: For installations with frequency converters operating below 20 Hz, the SIM-Q MKII with the LF option should be used for reliable measurements down to 5 Hz.

Maintenance Features:

Factory Settings: The product is delivered with factory settings that may not be optimal for all applications. Users must check and adjust settings before operation.
Electrostatic Discharge Awareness: During configuration, sufficient care must be taken to protect the PCB against static discharges. These precautions are not necessary once the unit is installed and connected.
Megger Test Warning: When performing a high-voltage "MEGGER" test during commissioning, the SIM-Q MKII must be disconnected at terminal "P" if the test voltage exceeds 1000 V AC/DC, to prevent damage to the unit. The built-in DC voltage generator impedance (approximately 250 kΩ) will also affect the insulation test.
Warranty: The unit should not be opened by unauthorised personnel, as doing so will void the warranty.

Deif SIM-Q MKII Specifications

General

Brand	Deif
Model	SIM-Q MKII
Category	Monitor
Language	English