Data Sheet

Camtec Power Supplies GmbH – Gewerbestraße 30 – DE76327 Pfinztal – Germany p.3/5 (06.2016-02-2)
Phone [phone] - Fax [phone] – www.camtec-gmbh.com - [e-mail]
(Subject to alterations. This product is not designed to be used in applications such as life support systems wherein a failure or malfunction could result in injury or death)
General Description
The CAMTEC ESB101-series are the 2nd generation and cost-effective inrush current limiters. The limiters are made for
115/230Vac 16A networks. The line frequency range is 16⅓Hz – 440Hz. The ESB101-Limiter shall be located between
the line-switcher/contactor and the load (p.2/Fig.1). The ESB-models are designed for capacitive loads (not for inductive
loads like coils/transformers, not for AC-motors and not for DC-voltage application). In the moment of switching-on the
system the inrush current of the installed load will be limited for the defined time T
on
(p.4/Fig.5). Independent from the
previous inrush level; the current limiting is always strict. After T
on
elapses the current limiting circuit of the ESB101 will
be bypassed. Then the load is directly connected to the AC. The electrical network can be stressed with current loads
as normal (e.g. motors, pumps). If an AC dump overshoots the defined time T
off
, it will be detected by the ESB101
(p.4/Fig.6). As soon as the AC recovers the inrush will be limited, again (p.2/Fig.3 & 4). The ESB101-models provide an
internal temperature control. In case of a failure the device shuts down to safely prevent from overheating or fire.
(Fig.1) (Fig.2)
Field Applications
The ESB101 limiter allows connecting much more capacitive loads (e.g. LED-power supply / LED-driver) to a pre-installed
circuit breaker CB (Fig.2). The ESB avoids that the MCB will be tripped. This occurs independent to the objective initial
current. The result is that the number of A.C. branch lines and the pre-installed MCB can be reduced dramatically.
Installation cost exhibit a sustained decline. Alternatively, the cross section of the branch lines can be reduced when
using smaller and faster responding circuit breakers. The cost saving from copper is essential. Sensitive AC networks
can be fused safer (e.g. Traffic Control Systems, Street-Lighting, Parking Lots and Tunnels). When the ESB101 is installed
correctly, the neutral wire (N) is looped trough (Fig.1). The inrush protection circuit always acts to the line conductor.
The load relates to the AC in such a way that a circuit breaker or an earth-leakage-trip works within the limits of the
legal rules. This fact is also applied while the limiting circuit acts. The ESB101 is designed for capacitive loads, only. The
ESB101 cannot be used together with transformers, coils, AC-motors & drives, heaters or with DC-voltage at all.
Special Models ESB101.LED with 115Vac & 230Vac
Compared to all other ESB101-models the LED-types are the universal inrush current limiters. The concept design is
made to construct optimized A.C. networks in the building automation and in the lighting sector. Tripping the installed
circuit breaker will be effectively prevented. The inrush limiting time is adjusted to the values of a typical LED switch
mode power supply or LED-drivers. The connectable load capacity is such as high, that even in the extremes cases it is
rather impossible to exceed it in a 16A network. Installed contractors will be discharged and their lifetimes will
considerable increase. To protect the installed relay in a controlled DALI-/DMX-Multiplexer we advise to use the
ESB101.23 for a 16A relay or the ESB101.16 for a smaller relay. Note that the ESB101 is not designed to operate together
with gas induction lamps or other conventional lighting device. The ESB101 is designed for capacitive loads, only.
Installation with ESB101
Conventional installation without ESB101
* Expected load capacity
100uF / SMPS
Switch Mode PS *
4pcs max.
Switch Mode PS
Load e.g.
LED-array
Load e.g.
LED-array
CB
Line
-
switcher
CB
Line
-
switcher