Sontay RE-3P-105 User manual

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© 2017 Sontay Limited. All rights reserved
Page 1 of 4
RE-3P-105
3-Phase Panel Mount 105kW
Issue Number: 7.0
Date of Issue: 02/01/2018
Four Elms Road Edenbridge
Kent TN8 6AB UK
Features & Benefits
0-10Vdc control input
Over temperature protection with auto reset
LED Indication
Efficient electronic switching
No additional heat sinks or RFI filters required
Technical Overview
The panel mounting Power Controllers RE-3P range are suitable for providing control of electric heating loads from an analogue signal. Applications
include electric heating coils, heating cables and electric furnaces. The units utilise solid-state switching with “zero crossing technology” to provide
accurate switching control.
All items are provided with an alarm output for over temperature protection and LED Indication of Output ON.
The RE-3P series are designed to mount on the control panel back plate.
Specification
Input signal 0-10Vdc
Input impedance 47k ohms
Heater duty 105kW
Rated load 146A
Rated supply 415Vac (+10/-15%) 50/60Hz
LED indication ON when output is on
Terminals:
Control Rising cage terminals
Power Din-rail terminals (35mm²)
Fuse type 315FM
Temperature -10 to +40°C Max, without re-rating *
Dimensions (H W D) 252 x 265 x 159mm
Fixing centres 243 x 194mm
Conformity CE Marked
Country of origin UK
* Units are rated at 40°C. If using at higher ambient temp, de-rate the
units by 20% at 50°C
The products referred to in this data sheet meet the requirements of
EU 2014/30/EU and 2014/35/EU
Product Codes
RE-3P-105 105kW, 3-phase 146A (per phase), Panel Mount
Heating Regulator
WEEE Directive:
At the end of the products useful life please dispose
as per the local regulations.
Do not dispose of with normal household waste.
Do not burn.

Tel: [phone] - E-mail: [email protected]om - Web: www.sontay.com
© 2017 Sontay Limited. All rights reserved
Page 2 of 4
RE-3P-105
3-Phase Panel Mount 105kW
Issue Number: 7.0
Date of Issue: 02/01/2018
Four Elms Road Edenbridge
Kent TN8 6AB UK
SAFETY REQUIRMENTS & ADVICE SHEET
Introduction
The objective of this leaflet is to provide information to ensure that the safety of the person(s) installing or maintaining the equipment is not
compromised and its location and method of installation does not endanger others, either during or after installation. Customers should be aware
of the Health and Safety at Work Act 1974 (HSW 1974) and the EC “Provision and Use of Work Equipment Regulations 1992” (PUWER). Both are
available from the Health and Safety Executive (HSE) publications, within the UK.
Installation
CE Directives
These are European regulations which apply to our industry. They affect the equipment emissions and immunity to Radio Frequency Interference
(RFI) and various elements of safety for electrical equipment.
The European Community ‘CE’ Directives that mainly concern Sontay Ltd are the Low Voltage Directive (LVD) and the Electromagnetic Compliance
Directive (EMC).
A Declaration of Conformity may be supplied with the product or supplied on request.
Torque Settings
Good working practises must be adhered to ensuring appropriate electrical and mechanical installation. This would include the mechanical fixing of
potentiometer bushes and electrical set screw and/or pillar connections. These Electrical Connections and Mechanical Fastenings must not be over
tightened. We would recommend a typical torque setting of 1 to 5Nm. For specific product information, see appropriate product data sheet,
where applicable.
Cooling Requirements
The use of an additional heatsink (this could be a conductive panel) suitably attached or mounted with the unit, will help to dissipate heat away
from the device(s). An alternative or additional method would be forced air-cooling (using a fan), to assist the natural convection of airflow over an
existing heatsink within the unit. The product fins should be mounted in line with the forced and/or natural airflow.
The equipment’s environment and its initial ambient temperature also need to be considered, as this could have an adverse effect on the overall
operating conditions.
Fusing
We recommend that semiconductor, fast acting to BS88 IEC 269, type fuses or circuit breakers (Semiconductor - MCB) should be used for unit
and/or device protection. The appropriate maximum load current should be known to select the required fuse or MCB, but must not exceed the
equipment rating. The I² t (A² s) rating of the selected fuse must be less than that of the equipment so as to protect the equipment’s discrete
device. Further appropriate fusing may be required for protection of the unit supply using standard fuse links and holders. Failure to address
these requirements and the use of incorrectly selected fuses may cause the equipment to fail.
Earthing
The protective conductor terminal of the equipment must be utilised at all times and bonded to a ‘good’ Earth (ground). The earth bonding
(strapping) leads of any combined equipment should be as short as possible and be substantial, i.e. at least rated higher than the equipment’s
load. For further information, refer to BS7671. Following these simple guidelines will ensure optimum use of any appropriate filter circuits which
may be required.
Insulation (over-voltage category) and Protection from electric shock Classification of Equipment
All equipment, unless otherwise stated, is rated to CLASS II Insulation (Over-voltage category) and CLASS I (Protection category).
Maintenance
Before any servicing is carried out, reference should be made to appropriate installation instructions, drawings and labelling which may come with
the equipment. Personnel should switch off the unit supply before accessing or removing any safety cover and be aware of hazardous live parts.
Safety Interlocks for Sontay RE Electric Heater Battery Controllers
Sontay Ltd. recommends that the installation and maintenance of all RE electric heater battery controllers should be done with reference to BS
7671:2008+A3:2015 (Requirements for Electrical Installations. IET Wiring Regulations).
All users of the IET Wiring Regulations should be aware of changes in Amendment No. 3 to the 17th Edition. Amendment No. 3 came into effect on
1 July 2015.
For international installations, please refer to local regulations for guidance.

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© 2017 Sontay Limited. All rights reserved
Page 3 of 4
RE-3P-105
3-Phase Panel Mount 105kW
Issue Number: 7.0
Date of Issue: 02/01/2018
Four Elms Road Edenbridge
Kent TN8 6AB UK
SAFETY REQUIRMENTS & ADVICE SHEET (continued)
Adherence to BS 7671, Chapter 42 (Protection Against Thermal Effects), and in particular;
420.3 –General Requirements,
421 –Protection Against Fire Caused by Electrical Equipment
o421.1
o412.2
422 –Precautions Where Particular Risks of Fire Exist
o422.1.2
o422.1.3
should be undertaken, and as a minimum, a mains isolation switch, a load-breaker switch and a contact breaker should be installed in the electric
heater battery controller supply. The supply to the contactor coil should be interrupted by an over-temperature (hi-limit) thermostat located in the
heater battery and also upon detection of airflow loss (fan proving), via an air flow switch, air DP switch across the fan or fan current switch in the
fan supply.
Additionally, EN 61508-1:2010 (Functional safety of electrical/electronic/ programmable electronic safety-related systems. General requirements)
stipulates the general requirements for electrical, electronic and programmable electronic safety devices, and covers the safety systems of electrical
equipment and their components that could have an impact on the safety of people and the environment if they fail. BS EN 61508-1 also applies to
protection and control systems, and helps organisations to identify hazards to improve overall equipment safety in the workplace.
Failure to incorporate these safety interlocks may result in the invalidation of fire insurance, building and contents insurance, and in extreme cases
may result in the disconnection of the electrical supply by the distributor.
Operation, Installation & Configuration
The RE-3P-105 has been designed to control electric heating loads in proportion to the incoming, selectable analogue signal. Control of the load is
facilitated by the use of solid-state semiconductor devices and feature zero crossing point switching of the AC load which virtually eliminates RFI
problems.
Caution
In normal operation the heat sink surface can exceed 90°C.
Dangerous voltages exist on the PCB and particular care should be taken. The RE-3P-105 must be installed in accordance with the relevant
statutory regulations and installation must be carried out by an experienced and fully qualified engineer.
Ventilation / Location
Install power controller with heatsink fins in the vertical plane. Allow a minimum of 100mm clearance top and bottom, and 25mm horizontally.
Control panels should have sufficient ventilation (grills or louvres as required) to maintain the ambient temperature through the thyristor unit to
below 40C°C to run unit to specified kW rating.
Over Temperature Monitoring
The RE-3P-105 is provided with an electronic thermal cut-out fitted to the heat sink to protect against over temperature. The unit will switch off the
load if the heat sink temperature exceeds 95°C and will automatically reconnect the load once the heat sink temperature has dropped below 85°C.
Upon switching, the alarm output from the control PCB will change from 24V to 0V.
The heat sink temperature will not reach 95°C under normal operating conditions. However, this might occur if the ambient temperature exceeds
40°C.
Installation must be carried out by a suitably trained electrician, and in accordance with the relevant statutory regulations.
Load Supply and Back-up Protection
High speed fuses or miniature circuit breakers should be utilised to provide back-up protection to the switching devices. It is recommended that a
load disconnect switch and a contactor are installed in the load supply. The supply to the contactor coil should be interrupted by an over-
temperature thermostat located in the heater battery and also upon detection of airflow loss.
Control Supply
There is a transformer fitted to the unit removing the requirement for a 24V supply (see wiring for details).
The control supply common is linked to the 0-10V Input Signal common. Screened cable should be used for connections to BMS Controllers, where
possible the cable screen should be connected to a functional earth and at one end only to avoid earth loops.
Maximum Heating Load
The power rating of the units are given as a guide. The maximum current (which is dependent on the actual supply voltage and heating load) must
not be exceeded.

Tel: [phone] - E-mail: [email protected]om - Web: www.sontay.com
© 2017 Sontay Limited. All rights reserved
Page 4 of 4
RE-3P-105
3-Phase Panel Mount 105kW
Issue Number: 7.0
Date of Issue: 02/01/2018
Four Elms Road Edenbridge
Kent TN8 6AB UK
Whilst every effort has been made to ensure the accuracy of this specification, Sontay cannot accept responsibility for damage, injury, loss or
expense from errors or omissions. In the interest of technical improvement, this specification may be altered without notice.
Jumper Settings & Connections
Typical 3-Phase installation
Input configuration
Star configuration: Delta configuration:
WARNING!
Do NOT connect the neutral to the star point of heater.
Load
Load
Load
Load
Load
Load