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Technica l addend um www.crejechnolocy.com

Technical addendum This document is intended to help understand our Product information and technical documentations, and make informed choices. It starts with installation hints. COMMON FEATURES Mounting Only install the charger in a pollution degree 2 environment (dry, well‐ventilated locations). Hang the charger vertically with the input terminal strip at the bottom. To fasten the charger on the 35 DIN rail (7.5 or 15): 1. Tilt the charger slightly rearwards 2. Fit the charger over top hat rail 3. Slide it downward until it hits the stop 4. Press against the bottom for locking 5. Shake...

Technical addendum By design our chargers are category II regarding the installation. As illustrated for home and factory, the risk of electrical shock is higher upstream in the distribution system, especially if the location is lightning-prone: CAT II: all outlets at more than 10m from CAT III or 20m from CAT IV If the category III or IV is required, a surge protection device must be added. Ask our customer service for advice. 1.2 Definitions The individual technical documentations specify various characteristics, such as  Charger inrush current: at power-on, a large pulse current is...

Technica l addend um www.crejechnolocy.com Connect the protective earth to ground. Isolate the charger from the AC source, before connecting or disconnecting a battery. Do not open the charger. Never charge a frozen battery. Due to a charge imbalance risk, avoid charging batteries in parallel. This table is given for information only; check with the battery manufacturer. To function as a "float charger" which senses the reduction in charging current and reduces the charging voltage, implement a boost strategy with a BPR B charger (see BPRB range/Overview); an external logic must remove the...

Technical addendum Derating The performance might downgrade beyond the specified limits in the technical documentations:  AC voltage below lower limit: Example: BP0524M (the AC voltage limit is 85V or 170V depending on the position of a switch)  Temperatures above the limits: NOTE General outlines are shown here. To see the accurate curves, refer to the specific Product information.

Technical addendum Paralleling chargers For a better availability or to increase the output currents, it is advised to parallelize several chargers. Except for BP+ range (where the diode is built in), Schottky diodes must be installed so that there is no reverse current and harmonics do not add. Redundancy is also possible. The diode SBX 2550 is connected between the terminals of a DIN terminal module. The kit includes the module and the diode. The chargers are hooked up as follows (in this case, AC inputs are L1-N): L1 For an optimal charge: 1. Adjust to identical voltages on both chargers...

Technica l addend um www.crejechnolocy.com Diagram block: A DC OK isolated relay output is activated in event of any fault. It is an NO contact. 2.1 Protections A Schottky diode must be installed on the output (positive terminal) to prevent reverse power in the case the battery has a higher voltage. It might result from a power outage: then the relay opens, the led goes off (unless there is no diode). The battery higher voltage might also be due to the charge by a charge alternator of a generator. Internal protections: • Overcurrent: constant current limiting. The charger provides constant...

Technica l addend um www.crejechnolocy.com Example of installation (the fuse and fuse module on the right are NOT provided): In this example, the diode is connected to the module on the right, but it can also span across the two smaller modules. AC side: install a fuse or a breaker on the input. The AC currents, and inrush currents in cold start, show in the data sheets. We suggest the following: Make sure that all strands of each stranded wire enter the connection terminal and the screw terminals are securely fixed to prevent poor contact.

BPxxxx 9 0020 b en Technical addendum 2.3 Comparison of the various models

Technica l addend um www.crejechnolocy.com OVP = Over Voltage Protection OTP = Over Temperature Protection by temperature switch (detection on one or both sides of the transformer) Leakage current: the Y capacitors between I/P and FG cause some leakage current flow from line or neutral to the case; the leakage current to the case is not dangerous. A proper connection to ground discharges the case. 3.1 Protections A Schottky diode must be installed on the output (positive terminal) to prevent reverse power in the case the battery has a higher voltage (due to input outage [the led goes off...

Technica l addend um www.crejechnolocy.com AC side: insert a breaker or fuse. The AC currents, and inrush currents in cold start, show in the data sheets. We suggest the following: Dual phase input in Wye connection: use of only two phases 3.3 Power factor The power switching generates harmonics and the capacitors do not absorb currents in phase with the source. Use BP1024M or BP2024M when the power factor is a concern: • BP 1024M features an active PFC function; the block diagram is similar to the one of the BPRB range (without UVP, see further). This results in a high power factor. • BP...

Technica l addend um www.crejechnolocy.com * Derating from 55°C @230 Vac, from 40°C @110Vac ** 2 kV for BP 4024T

Technica l addend um www.crejechnolocy.com I/P = Input, FG = Front Ground OCP = Over Current Protection OVP = Over Voltage Protection OTP = Over Temperature Protection by temperature switch (sensor in air) Leakage current: the Y capacitors between I/P and FG cause some leakage current flow from line or neutral to the case; the leakage current to the case is not dangerous. A proper connection to ground discharges the case. 4.1 Protections The integral Schottky diode prevents reverse power in the case the battery has a higher voltage (due to input outage [the led goes off], or due to the...