Delta Elektronika M Series User Manual

M - SERIES
LINEAR POWER SUPPLIES WITH HIGH EFFICIENCY AND HIGH RELIABILITY
The M-series has proved to be one of the most reliable series of modular power supplies. Many thousands are being
used without any problems for more than 25 years. According to our statistics over many years the average number of
repairs is less than one per thousand per year, including faults caused by wrong use. The circuits of these linears are
very simple compared with the complexity of switchers. The number of components is only a fraction of that of a
switcher. Moreover the components are very reliable.
The disadvantages compared with switchers are the relatively larger weight and dimensions and a lower efficiency.
The M-series modular power supplies are designed for use at a fixed output voltage. The M 15-16 HE for 15 V 16 A has a
tap point on the transformer secondary so that it can also be used at 12 V 16 A. In the same way the M 60-5 HE can also
be used at 48 V 5 A.
Model
V
out
I
out
Efficiency Size
M 15 - 16 HE
12 V / 15 V
16 A
70 % half rack
M 24 - 12 HE
24 V 12 A
74 % half rack
M60-5HE
48 V / 60 V
5 A
75 % half rack
M 24 - 20 HE
24 V 20 A
74 % full rack
M 48 - 10 HE
48 V 10 A
75 % full rack
Some features are:
*
Extra output terminal via a built-in diode for use in redundant operation
*
Built-in adjustable overvoltage protection (crowbar type)
*
Very low output ripple
*
Fast response to load transients
*
No generation of RFI
*
It withstands the high energy impulse test 2.3 Û
N
1.3 ms of VDE 0160
*
Split bobbin transformer
half rack
full rack
P.O. BOX 27
4300 AA ZIERIKZEE
NETHERLANDS
TEL. +31 111 413656
FAX +31 111 416919
www.DeltaPowerSupplies.com

Delta Elektronika M Series Specifications

General

Brand	Delta Elektronika
Model	M Series
Category	Power Supply
Language	English

Summary

M-Series Linear Power Supplies

M-Series Product Overview and Reliability

Introduction to the M-series, highlighting high efficiency, reliability, and simplicity.

M-Series Model Specifications

Details M-series models with output voltage, current, efficiency, and size specifications.

M-Series Key Features

Summarizes key features like redundant operation, overvoltage protection, and low ripple.

M-Series Power Supply Specifications

Input, Fuses, and Power Factor

Details input voltage ranges, fuse types, ratings, and power factor for M-series units.

Insulation, Safety, and EMC Compliance

Covers insulation specifications, safety standards (EN, VDE), and EMC conformity.

Performance Characteristics and Recovery

Details performance metrics like temperature coefficient, drift, impedance, and output recovery time.

Operational Parameters: Regulation, Hold-up, and Noise

Covers voltage regulation, hold-up time, and ripple/noise specifications.

M-Series Operational Modes and Adjustment

Output Voltage Adjustment Ranges

Defines the adjustable output voltage ranges for various M-series power supply models.

Efficiency Ratings and Optimization

Discusses the efficiency of the M-series and methods to improve it.

Parallel and Redundant Operation Configurations

Explains configurations for parallel operation (current sharing) and redundancy.

M-Series Physical Configuration and Protection

Series Operation and Protective Features

Describes series connection capability and protective functions like OVP and UV alarm.

Cooling, Temperature, and Mounting

Guidance on cooling, operating temperature limits, derating, and rack mounting.

Physical Dimensions and Accessories

Details unit dimensions, weight, and optional accessories like perforated covers.

M-Series Safety and Handling Guidelines

General Safety Precautions and Warnings

Essential precautions for safe operation, service, and repair of the power supplies.

Grounding and Fuse Replacement Procedures

Instructions for proper electrical grounding and authorized fuse replacement.

Environmental Conditions and Disposal

Operating Environmental Parameters

Specifies environmental operating parameters such as temperature, humidity, and altitude.

WEEE Product Disposal Guidelines

Information regarding the correct disposal of M-series products under WEEE regulations.

Load Division and Fuse Implementation

DC Output Fuse Considerations

Discusses limitations of DC output fuses and suggests alternatives like circuit breakers.

Capacitor Use for Voltage Dip Mitigation

Explains how adding capacitors can improve performance during fuse blow events.

Redundant Operation and Current Limiting

Setting Up Redundant Parallel Operation

Guide to configuring power supplies for redundant parallel operation using diodes.

Current Limit Adjustment for Parallel Use

Instructions for adjusting current limit for proper load sharing in parallel setups.

Optional Alarm Circuit Integration

Details on optional alarm circuits (P366) for monitoring power supply status.

OVP Setting and Inrush Current Control

How to Set Overvoltage Protection (OVP)

Step-by-step instructions for configuring the OVP tripping point on M-series units.

OVP Adjustment with Transformer Taps

Specific guidance for setting OVP when using alternative transformer taps.

Inrush Current Limiter Functionality

Explanation of the inrush current limiter and its peak current limitations.

Field Wiring Instructions

Wiring Specifications and Torque

Guidelines for field wiring, including conductor material, temperature class, and terminal torque.

EC Declaration of Conformity

Electromagnetic Compatibility (EMC) Declaration

Formal declaration of M-series compliance with EMC directives and standards.

Electrical Safety Compliance Declaration

Formal declaration of M-series compliance with Low Voltage Directive and safety standards.