Sound-insulated fan VENTS KSB 125 K2 EC

Description
Characteristics
Capacity diagram
Downloads
Dimensions
Additional characteristics
Designation key

Description

APPLICATION
The KSB K2 EC fans are designed for supply and exhaust ventilation of premises with high requirements to the noise level and with limited space for mounting.	For example, the unit design includes a possibility of space-restricted installation above suspended ceilings. Compatible with Ø 100-500 mm air ducts.
DESIGN
The fan casing is made of aluzinc. For easy installation and operation, the cover of the fan is secured with a special lock. The casing is heat- and sound-insulated with a 50 mm layer of non-flammable mineral wool. To ensure better noise absorption, the inner surface of the insulation is made of a perforated metal sheet. The round connecting spigots are rubber sealed.
MOTOR
The units feature efficient electronically commutated (EC) direct current motors with an external rotor and centrifugal impellers with forward curved blades. EC motor is free of friction and wear parts such as a commutator and brushes. These components are replaced by a maintenance-free electronic circuit board.	EC motors are characterised with high performance and optimum control across the entire speed range. In addition to that, the efficiency of the electronically commutated motor reaches very impressive levels of up to 90 %.
INTEGRATED FUNCTIONS AND CONTROL
The fan is controlled with an external control signal 0-10 V (capacity control is performed depending on temperature, pressure, smoke level etc.). The fan has low energy consumption at any speed.	Maximum fan speed does not depend on the available current frequency and is suitable for operation both at 50 and 60 Hz. The fans can be connected to centralized computer ventilation control systems.
INSTALLATION
Duct fans are intended for mounting to round air ducts. The fans are installed between the air ducts. In case the fan is mounted on flexible joints, attach the fan to a structural unit by means of supports, suspension links or brackets.	The fan may be installed in any position in consideration of the air flow direction (as indicated by the arrow on the fan casing). While mounting the fan provide enough access for servicing and repair operations.

Characteristics

Parameter	KSB 125 K2 EC	Measurement unit
Frequency	50/60	Hz
Phase	1	˜
Voltage	200-277	V
Power	78	W
Current	0.59	A
Sound pressure level at 3 m distance	39	dBА
Air capacity	444	m³/h
EC motor	yes	-
RPM	3270	min^-1
Protection rating	IP X4	-
Design	centrifugal	-
Transported air temperature	-25 ... +50	°С
Duct diameter	125	mm
Casing material	aluzinc	-
Weight	12	kg
SEC Class	B	-
Outdoor mounting	no	-
Sound-insulated casing	yes	-
Duct	for round air ducts	-
Type	supply and exhaust	-
Mounting	Inline	-

Capacity diagram

Selection method:
Air flow:
Pressure:

Operating point

Air flow: --
Pressure: ---

Files archieve

Downloads

Dimensions

Characteristics

Parameter	Value	Measurement unit
∅D	124	mm
B	420	mm
B1	228	mm
B2	517	mm
H	270	mm
L1	507	mm
L2	414	mm

Additional characteristics

Sound power level [A-filter]											Sound pressure level at a distance of 3 m [A-filter]	Sound pressure level at a distance of 1 m [A-filter]
Sound power level		Gen.	Octave frequency band [Hz]								Sound pressure level at a distance of 3 m [A-filter]	Sound pressure level at a distance of 1 m [A-filter]
	Hz	Gen.	63	125	250	500	1000	2000	4000	8000	LpA, 3 m dBA	LpA, 1 m dBA
L_wA to inlet	dBA	66	51	60	64	55	51	44	44	34	46	56
L_wA to outlet	dBA	85	70	80	82	77	63	54	57	48	65	75
L_wA to environment	dBA	59	44	49	55	55	46	45	44	43	39	49

Designation key

Series	Duct diameter	Modification	Motor	Options
VENTS KSB	100, 125, 150, 160, 200, 250, 315, 355, 400, 450, 500	К2: heat- and sound-insulated casing	ЕС: synchronous electronically commutated motor	R: power cord with the IEC C14 connector