Nidec EM15 Excitation Module
This manual concerns the EM15 which you have just purchased.
We wish to draw your attention to the contents of this maintenance manual.
Contents
SAFETY MEASURES
Before using your EM15 for the first time, it is important to read the whole of this installation and maintenance manual.
All necessary operations and interventions on this machine must be performed by a qualified technician.
Our technical support service will be pleased to provide any additional information you may require.
The various operations described in this manual are accompanied by recommendations or symbols to alert the user to potential risks of accidents. It is vital that you understand an take notice of the following warning symbols.
The EM15 can be incorporated in a ECmarked machine.
Warning symbol for an operation capable of damaging or destroying the machine or surrounding equipment.
Warning symbol for general danger to personnel.
Warning symbol for electrical danger to personnel.
All such operations performed on the EM15 should be undertaken by personnel trained in the commissioning, servicing and maintenance of electrical and mechanical components.
© 2023 Meteors Leroy-Somer SAS
Share Capital: 32,239,235 €, RCS Angouleme 338 567 258.
We reserve the right to modify the characteristics of this product at any time in order to incorporate the latest technological developments. The information contained in this document may therefore be changed without notice.
This document may not be reproduced in any form without prior authorization.
All brands and models have been registered and patents applied for.
GENERAL DESCRIPTION
The EM15 Excitation Module is a power electronics component designed to provide excitation current to the generator that is controlled by an External Voltage Regulator (EVR).
Leroy-Somer is leading the power generation marketplace with power solutions engineered to deliver unmatched flexibility, expandability, reliability and cost-effectiveness.
Features
- Over-excitation protection – limit can be adjusted via a potentiometer (IEXC)
- Green status LED indicating unit is powered on
- Red status LED indicating excitation current limiting (flashing) or shutdown (solid)
The External Voltage Regulator system offers: - Automatic Voltage Regulation (AVR)
- Programmable stability settings
- Soft start control with an adjustable time setting in AVR control mode
- Dual Slope Under Frequency (Volts / Hz) regulation
- Three-phase or single-phase generator voltage (RMS) sensing/regulation in AVR mode
The EVR can also offer: - Power Factor Regulation (PF)
- Generator paralleling with reactive droop compensation
- Line drop compensation
Complete system integration
The EM15 is designed and factory tested to work seamlessly with Leroy-Somer alternators using Shunt Excitation (SE), AREP Excitation (AREP) or Permanent Magnet (PMG) excitation systems.
SPECIFICATIONS
Electrical
| Generator excitation types | Shunt excitation / AREP excitation / Permanent Magnet (PMG) |
| Max. continuous field current output | 7 Amps |
| Max. forcing field current output | 15 Vrms |
| Max. AC voltage input (X1:X2, Z1:Z2) | 240 Vrms |
Environmental
| Operating temperature range | -40 °C (−40 °F) to +70 °C (+158 °F) |
| Storage temperature range | -40 °C (−40 °F) to +85 °C (+185 °F) |
| Relative humidity tolerance | 95% non-condensing humidity |
| Salt spray | 5% salt (NaCl) solution for 120 hrs |
| Vibration | 4.5 G-rms, 24-2000 Hz in 3 orthogonal planes |
| Electromagnetic compatibility | RF Immunity (radiated & conducted) RF Emissions (radiated & conducted) Electrical transients |
| Weight | 800 g ± 30 g |
| Power consumption (at max. continuous rating) | <600 VA |
Conformity
| UL | UL Recognized (U.S. and Canada) File No. E334232 |
| CE integration certificate | In conformity with the applicable requirements of the following standards: EN 50178 EN 60204-1 EN 61000-6-2 EN 61000-6-4 |
OVER-EXCITATION PROTECTION
If a short-circuit fault occurs at the generator terminals, the EM15 will allow the excitation current to rise to the upper limit value set by the adjustment potentiometer (max. 15 A).
The excitation current will be clamped at the upper limit value for 10 seconds (fixed internally).
After 10 seconds, the excitation current is reduced to a value of 10% of the potentiometer setting.
DIMENSIONS
(in mm)
EXAMPLE CONNECTION DIAGRAM
(Permanent Magnet Excitation)
Notes:
- External fuses required with EM15 module
- Recommend 250V, 10A fast acting fuses
2-way Connector Functions:
| Label | Function |
| F+ | Exciter Field Positive Output |
| F- | Exciter Field Negative Output |
3-way Connector Functions:
| Label | Function |
| Shield | Excitation Command Shield |
| CS+ | Excitation Command Positive Input |
| CS- | Excitation Command Negative
Input |
4-way Connector Functions (PMG Excitation):
| Label | Function |
| X2 | Excitation Power Supply Input (PMG Phase B) |
| Z1 | Not Connected |
| X1 | Excitation Power Supply Input (PMG Phase A) |
| Z2 | Excitation Power Supply Input (PMG Phase C) |
4-way Connector Functions (Shunt Excitation):
| Label | Function |
| X2 | Excitation Power Supply Input (Single-phase) |
| Z1 | Not Connected |
| X1 | Excitation Power Supply Input (Single-phase) |
| Z2 | Not Connected |
4-way Connector Functions (AREP Excitation):
| Label | Function |
| X2 | Excitation Power Supply Input (Aux Winding 1 – Positive) |
| Z1 | Excitation Power Supply Input (Aux Winding 2 – Positive) |
| X1 | Excitation Power Supply Input (Aux Winding 1 – Negative) |
| Z2 | Excitation Power Supply Input (Aux Winding 2 – Negative) |
Service & Support
Our worldwide service network of over 80 facilities is at your service.
This local presence is our guarantee for fast and efficient repair, support and maintenance services.
Trust your alternator maintenance and support to electric power generation experts.
Our field personnel are 100% qualified and fully trained to operate in all environments and on all machine types.
We have a deep understanding of alternator operation, providing the best value service to optimise your cost of ownership.
Where we can help:
Connect with us at:
Scan the code or go to:
https://www.lrsm.co/support
Customer Service
Contact us:
Americas: +1 (507) 625 4011
EMEA: +33 238 609 908
Asia Pacific: +65 6250 8488
China: +86 591 8837 3010
India: +91 806 726 4867
https://www.leroy-somer.com/epg