smart

SUBJECT:

star bulletin

Date:

December 9, 2014

Order No.:

SM-B-54.10/12

Group:

54

MY-All, Models 451.390/391/392149014911492
Personal Protective Equipment for Working on High-Voltage On-Board
Electrical Systems
WARNING! Risk of death and personal injury may occur when
touching components on vehicles with high-voltage on-board
electrical system if not done properly. Do not touch components
and open lines of the high-voltage on-board electrical system.

Persons who are carriers of electronic implants (e.g. cardiac pacemakers) should not carry out any
work on high-voltage on-board electrical systems due to increased risk of death or personal injury.
Work on a high-voltage system or on hybrid components may only be conducted by certified
workshop personnel. NO OTHER WORKSHOP PERSONNEL may perform work on the high
voltage system or hybrid components.
MBUSA High-Voltage Awareness e-Learning course, TECH717 must be successfully completed
before diagnosing a HV vehicle and proceeding with service has even further requirements.
Service work that is not HV-related, such as tire replacement, can also be done by professionals
meeting the same minimum requirement of high voltage awareness training.
Protective Scope
The personal protective equipment (PPE) provides protection against potential hazards when
working on vehicles on which the condition of the HV on-board electrical system cannot be clearly
determined (e.g. accident vehicles).
•

Potential Hazards

•

Electrical hazards through electric shock (e.g. through contact protection that is no longer
fully effective).

•

Thermal hazards through electric arcing in event of short circuit or when detaching plug-in
connectors.

This bulletin has been created and maintained in accordance with MBUSA-SLP S4230H001, Document and Data Control, and MBUSASLP S424HH001, Control of Records.

© 2014 Mercedes-Benz USA, LLC.

or in part is not permitted without authorization from the

Dealer Workshop Services

publisher. Printed in U.S.A.

www.MBUSA.com

1-800-FOR-MERCedes

www.startekinfo.com

,-

All rights reserved. Reproduction or translation in whole

Mercedes-Benz Canada, Inc.

•

Chemical hazards caused by leaking media (e.g. electrolyte from a mechanically damaged
high-voltage battery).

Use
•

Manual disabling.

•

Initial diagnosis of accident
vehicles.

•

Handling mechanically
damaged high-voltage
batteries (removal,
assessment, storage in
secure containers).

Requirements and Standards for Protective Gloves
•

Voltage sustaining capability of at least 1000 V AC/1500 V DC (maximum voltage in
vehicle 750 V DC, as at 2014).

•

Thermal protective effect as per DIN EN 60903:2012 Section 5.8.2 must be documented.

•

Resistance to acids and oils.

The above-mentioned requirements are deemed to be sufficient, because a thermal resistance is
also given. In Europe, protective gloves must be used that comply with the DIN EN/IEC 60903
standard, protection class 0 (R (Acids + oil + ozone) + C (low temperature)). The appropriate
identification for the requirements are listed in the table below. We in the U.S. meet or exceed
these standards.

Requirements and Standards for Electric Arcing Jacket and Face Protection with Industrial
Safety Helmet
The requirements as per EN ISO 11612 are valid for electric arcing jackets.
•

Face/eye protection is subject to the requirements as per EN 166.

NOTE : Face protection with an industrial safety helmet as per EN 397 may also be worn as an
option.
Procurement
NOTE : Personal protective equipment (PPE) should have been pushed to your dealership or you
can obtain via the SSEP.
Testing
1. All tooling, equipment, protection products and aids, which are specified for safe operation
and working on, with or in the vicinity of electrical systems, must be suitable for such use,
be in proper working condition and be deployed as intended.
2. Visual inspection of protective gloves before each use for cracks, piercing, abrasion or any
other form of damage.

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S-B-54.10/266

3. Check protective gloves for leaks before each use through trapping air in the glove and
rolling it up (or by using a pneumatic glove tester).
4. Additional tests as specified by manufacturer.
Color Code Marking
Color code, protection classes and protective glove standards are indicated in Figure 2.
Protective gloves: Color code as per
protection class 0, red (as per EN 60903)

3 Protective gloves

3

A Protection class
B DIN standard
C Symbol: Suitable for working under
applied voltage
Figure 2.

Voltage class as per IEC
60903
AC
DC

Categories (resistance) as
per IEC 60903

00: 500 v
O: 1000V
1: 7500 v
2: 17000V
3: 26500V

00: 750V

A: Acid
H: Oil

4: 36000V

4: 54000V

o: 1500 v
1: 11250 v
2: 25500V
3: 39750V

Z: Ozone

R:A+ H+Z
Composite: RC +
mechanical protection
C: Very low temperatures

S-B-54.10/266

IT

P54.10-4194-80

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