ABB 1SVR550029R8100 CT-MFE Multifunction Time Relay

The ABB 1SVR550029R8100 is a CT-MFE multifunction electronic time relay
belonging to the ABB CT-E range of electronic timers. It is designed for
control applications where switching actions must be performed according
to a defined time interval or timing sequence. The CT-MFE combines several
timing functions in one compact relay, allowing the same device to be
configured for different control requirements.

According to ABB product documentation, the 1SVR550029R8100 supports a
control supply voltage of 24 to 240 V AC/DC and provides six selectable
timing functions with eight timing ranges covering 0.05 seconds through
100 hours. This wide adjustment range allows the relay to be applied to
both short-duration control operations and longer industrial sequencing
requirements.

ABB 1SVR550029R8100 Product Overview

The CT-MFE is intended to provide configurable timing control within
electrical and automation systems. Rather than using a separate timer
relay for every timing requirement, the multifunction design allows the
operating mode and time range to be selected from the relay itself.
This makes the 1SVR550029R8100 suitable for control panels in which
different switching sequences may need to be implemented using a common
relay platform.

The device provides one change-over output contact, also described as a
1 c/o or SPDT contact. The output is rated at up to 250 V AC and 4 A,
allowing the relay to interface with suitable control circuits and
switching components. The control supply accepts both AC and DC voltage
from 24 V through 240 V, providing broad compatibility with commonly
used industrial control voltages.

The front-panel configuration concept of the CT-MFE allows the required
timing function and time range to be selected according to the control
sequence. The relay is designed for DIN rail mounting and uses screw
terminals for electrical connections, making it appropriate for organized
installation inside electrical control cabinets.

Technical Specifications

Multifunction Timing Capability

One of the main characteristics of the ABB 1SVR550029R8100 is its
multifunction timing architecture. ABB documentation identifies the
CT-MFE with several timing modes intended for different switching
sequences. These include ON-delay operation, OFF-delay-related control,
impulse functions, and flasher functions with selectable starting
conditions.

The six operating functions give the CT-MFE flexibility when it is
incorporated into an automation circuit. Depending on the selected
configuration, the relay can introduce a defined delay before a contact
changes state, maintain an output for a predetermined interval, or
generate repetitive switching behavior. The available timing range
selection further allows the same relay to address substantially
different time requirements without changing the basic device type.

The eight timing ranges extend from 0.05 seconds to 100 hours. This
range is particularly useful in industrial control applications where
timing requirements can vary from rapid control pulses to extended
process intervals. The broad range also simplifies component selection
because a single CT-MFE configuration can cover multiple timing
requirements within its specified operating range.

Control Supply and Output Interface

The ABB 1SVR550029R8100 is designed for a wide control supply range of
24 to 240 V AC/DC. Supporting both alternating and direct current
supplies gives the CT-MFE greater flexibility when integrated into
electrical control systems with different control voltage architectures.

Its output uses one change-over contact. The SPDT configuration provides
a common contact with normally open and normally closed switching
paths, allowing the timing relay to control an appropriate downstream
circuit according to the selected timing function. The specified output
rating is 250 V AC at 4 A, and the connected load should remain within
the applicable electrical specifications.

Installation and Panel Integration

The CT-MFE uses a compact DIN rail mounting format intended for
installation inside control cabinets and distribution assemblies.
Screw terminals provide the electrical connection method, while the
front-facing adjustment arrangement makes configuration accessible
after the relay has been installed in the panel.

ABB documentation lists an IP20 degree of protection and an operating
temperature range of -20 °C to +60 °C. These characteristics should be
considered when determining the installation environment and enclosure
requirements. Proper wiring, appropriate protection, and compliance
with the applicable electrical installation standards remain important
when integrating the relay into a control system.

Typical Industrial Applications

The ABB 1SVR550029R8100 can be used wherever a control circuit requires
configurable time-dependent switching. Typical applications for a
multifunction timer relay include sequential control, delayed switching,
pulse generation, motor control circuits, machine automation, lighting
control, ventilation systems, and general electrical control panels.

In automation equipment, a timer relay can coordinate different stages
of a control sequence by introducing a defined delay between electrical
events. For example, one output may need to operate after a short
interval, remain active for a specified period, or repeat according to
a cyclic timing sequence. The CT-MFE provides these types of timing
capabilities through its selectable functions and adjustable time
ranges.

ABB CT-E Series Design

The 1SVR550029R8100 forms part of ABB’s CT-E family of electronic time
relays. The CT-E range includes different timer configurations intended
for applications requiring various timing functions, supply voltages,
contact arrangements, and time ranges. The CT-MFE version is distinguished
by its multifunction configuration and broad 24-240 V AC/DC supply range.

For system designers and maintenance engineers, identifying the complete
order number is important because closely related CT-E products can have
different electrical characteristics or timing functions. The order
number 1SVR550029R8100 specifically identifies the CT-MFE configuration
described in ABB documentation.

Why ABB 1SVR550029R8100 Is Suitable for Timing Control

The main advantage of the ABB 1SVR550029R8100 is the combination of
multifunction timing, a wide timing adjustment range, broad AC/DC
control supply compatibility, and a compact DIN rail format. Instead
of selecting a dedicated timer for every individual delay requirement,
the CT-MFE can be configured for several common timing operations.

Its 0.05-second to 100-hour timing range covers a particularly broad
spectrum of control requirements. Combined with the 1 c/o output and
250 V AC / 4 A rating, the relay provides a practical interface between
timing logic and suitable electrical control circuits.

Conclusion

ABB 1SVR550029R8100 is a CT-MFE multifunction electronic time relay from
the ABB CT-E range. It provides six timing functions, eight selectable
timing ranges from 0.05 seconds to 100 hours, a 24-240 V AC/DC control
supply, and one change-over output contact rated at 250 V AC / 4 A.
DIN rail mounting and screw terminal connections support its integration
into conventional industrial control cabinets.

With its configurable timing functions and wide operating range, the
ABB 1SVR550029R8100 is designed for applications where controlled delays,
pulses, cyclic switching, or other time-dependent electrical operations
are required. Its clearly defined order number and CT-MFE designation
also make it straightforward to identify when selecting components for
automation and electrical control systems.