TE200S User manual
5-2
Chapter 5 MAINTENANCE
Danger!
The SSR must be maintained by personnel qualified and trained to work with low
voltage electrical equipment in an industrial environment.
The user’s installation must be protected upstream (non high-speed fuses, thermal
or electromagnetic circuit breaker, suitable fuse-isolator) and must comply with
current standards.
FUSES
Thyristor protection
Thyristors in the TE200S series of SSRs are protected in the following way:
• by external high-speed fuses against overcurrents (except for short-wave infrared
applications); these fuses must be ordered separately;
• by RC snubbers and internal MOVs (varistors) which protect against fast voltage
transient and transient overvoltages.
Danger !
High-speed fuses are used only for the internal protection of thyristors against
large amplitude overloads.
Under no circumstances should these fuses be used to protect the installation.
Warning !
For the use of high-speed fuses in short-wave infrared applications, please contact
Eurotherm Controls.
Warning !
For resistive loads (except short-wave infrared applications) the use of any fuses
other than those recommended for thyristor protection will invalidate the
guarantee.
MAINTENANCE
!
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Summary of Contents for TE200S
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