Datasheet > TP15900-4

TP15900-4

更新时间： 2024-01-28 02:34:20

品牌	Logo	应用领域
库柏 - COOPER		/
页数	文件大小	规格书
3页	75K
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Analog Circuit

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TP15900-4 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.84	Base Number Matches：	1

TP15900-4 数据手册

Bussmann

Telpower Fused Disconnect Switch

TP15900-4

DC Distribution/Protection System

Proper sizing of the current limiting resistor, referred to

as R_ALARMin the diagram below, is essential to prevent

excessive current, which could cause damage to the

LED in the disconnect head, from passing through the

remote alarm circuit. Because the LED is in series with

the remote alarm circuit, the maximum available alarm

circuit current should be limited to no more than 30 mA.

By calculating the minimum value of R_ALARMas

described above, the maximum available remote alarm

circuit current will not exceed 30 mA. In the event of

multiple fuse blows, where the fuses are connected in

parallel on the same remote alarm bus, the total avail-

able remote alarm circuit current will be evenly divided

between each of the LED’s. For example, if three fuses

This is the maximum sustained current that can be toler- blow, each LED, indicating the presence of a blown fuse,

ated by the LED. It is important to note that when calcu- will conduct approximately 10 mA each, assuming the

lating the size of the resistor, the number of circuits in

parallel on the remote alarm circuit is irrelevant. The

resistor value should always be calculated assuming that

the total available alarm circuit current is conducted

through a single LED. This will insure that the 30 mA

limitation is not exceeded. The calculations required to

determine both the resistance and the wattage rating of

total available remote alarm circuit current is 30mA.

R_ALARMare shown below.

METHOD FOR CALCULATING THE MINIMUM SERIES RESISTANCE VALUE NECESSARY TO LIMIT THE AVAIL-

ABLE ALARM CIRCUIT CURRENT TO ≤ 30mA. THE MINIMUM RESISTOR WATTAGE CALCULATIONS IS ALSO

SHOWN.

VSYSTEM

ILED

RALARM =

(where ILED - 30 mA max.)

PRALARM = (VSYSTEM)(ILED) (where ILED - 30 mA max).

Form No. TP15900-4

Page 3 of 3

12-1-99

BIF Doc #5001

SB99155

Rev. A

1 23

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