Page 19 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019
4 .Safety requirements and/or protective measures

4.1 General
EPAC shall be designed according to the principles of EN ISO 12100 for relevant but

not significant hazards, which are not dealt with by this document. It includes
evaluation of such risks for all relevant components.
Means shall be provided to the user to prevent an unauthorized use of the EPAC e.g.

key, locks, electronic control device.
4.2 Electrical requirements
4.2.1 Electric circuit
The electrical control system shall be designed so that, should it malfunction in a
hazardous manner, it shall switch off power to the electric motor without causing a

hazardous situation and it requires user interaction to switch on again.

4.2.2 Controls and symbols
The electrical control system shall be designed so that, should it malfunction in a

hazardous manner, it shall switch off power to the electric motor without causing a
hazardous situation and it requires user interaction to switch on again.
NOTE The mechanical brakes serve as an emergency stop device and provide fast and safe

stopping in emergency situations.
4.2.3 Batteries

4.2.3.1 Requirements

a) The EPAC and batteries pack shall be designed in order to avoid risk of fire and
mechanical deterioration resulting from abnormal use. Compliance is checked by the
test described in 4.2.3.2.

b) During the test the EPAC and the batteries shall not emit flames, molten metal or
poisonous ignitable gas in hazardous amounts and any enclosure shall show no damage
that could impair compliance with this European Standard. Safety and compatibility of
the battery/charger combination shall be ensured, according to the manufacturer's

specifications.
c) The battery terminals shall be protected against creating an accidental short circuit.
d) An appropriate care shall be taken to ensure that the batteries are protected against
overcharging. An appropriate overheating and short circuit protection device shall be

fitted.
NOTE Example solutions are given in Annex A.

Batteries and the charger unit shall be labelled in order to be able to check their
compatibility.

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